يعرض 1 - 20 نتائج من 111 نتيجة بحث عن '"Schifano, R."', وقت الاستعلام: 0.68s تنقيح النتائج
  1. 1
    Academic Journal

    المؤلفون: Schifano, R.1 (AUTHOR) schifano@ifpan.edu.pl, Gieraltowska, S.1 (AUTHOR), Kurek, J.1,2,3 (AUTHOR), Wachnicki, L.1 (AUTHOR), Rehman, U.1 (AUTHOR), Budiakivska, D.1,2 (AUTHOR), Chusnutdinow, S.1 (AUTHOR), Kopalko, K.1 (AUTHOR), Porro, S.4 (AUTHOR), Jakiela, R.1 (AUTHOR), Minikayev, R.1 (AUTHOR), Witkowski, B. S.1 (AUTHOR), Pawlowski, M.2 (AUTHOR), Jastrzebski, C.2 (AUTHOR), Thøgersen, A.5 (AUTHOR)

    المصدر: Journal of Applied Physics. 12/28/2024, Vol. 136 Issue 24, p1-17. 17p.

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    Academic Journal

    المؤلفون: Schifano, R.1 (AUTHOR) schifano@ifpan.edu.pl, Wierzbicka, A.1 (AUTHOR), Dluzewski, P.1 (AUTHOR), Domagala, J. Z.1 (AUTHOR), Wozniak, W.1 (AUTHOR), Kurowska, B.1 (AUTHOR), Bazioti, C.2 (AUTHOR), Guziewicz, E.1 (AUTHOR)

    المصدر: Journal of Applied Physics. 8/7/2022, Vol. 132 Issue 5, p1-11. 11p.

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    Academic Journal

    وصف الملف: text

    Relation: https://eprints.keele.ac.uk/id/eprint/6113/1/martini-2019.pdf; Martini, A orcid:0000-0002-6349-0831 , Weis, L, Fiorenzato, E, Schifano, R, Cianci, V, Antonini, A and Biundo, R (2019) Impact of Cognitive Profile on Impulse Control Disorders Presence and Severity in Parkinson's Disease. Frontiers in Neurology, 10.

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    Academic Journal

    المؤلفون: Schifano, R.1 (AUTHOR) schifano@ifpan.edu.pl, Jakiela, R.1 (AUTHOR), Galeckas, A.2 (AUTHOR), Kopalko, K.1 (AUTHOR), Herklotz, F.3 (AUTHOR), Johansen, K. M. H.2 (AUTHOR), Vines, L.2 (AUTHOR)

    المصدر: Journal of Applied Physics. 9/28/2019, Vol. 126 Issue 12, pN.PAG-N.PAG. 17p. 6 Charts, 11 Graphs.

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    Academic Journal
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    Academic Journal

    المساهمون: Martini, A., Weis, L., Schifano, R., Pistonesi, F., Fiorenzato, E., Antonini, A., Biundo, R.

    Relation: info:eu-repo/semantics/altIdentifier/pmid/31898759; info:eu-repo/semantics/altIdentifier/wos/WOS:000505378800001; volume:127; issue:3; firstpage:323; lastpage:330; numberofpages:8; journal:JOURNAL OF NEURAL TRANSMISSION; http://hdl.handle.net/11577/3359101; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85077553213

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    Academic Journal
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    Academic Journal
  9. 9
    Conference

    المساهمون: Biundo, R., Weis, L., Fiorenzato, E., Gentile, G., Giglio, M., Campo, M., Schifano, R., Antonini, A.

    Relation: ispartofbook:Movement Disorders; 19th International Congress of Parkinson’s Disease and Movement Disorders; volume:5; journal:MOVEMENT DISORDERS; http://hdl.handle.net/11577/3254393; http://www.mdsabstracts.com/abstract.asp?MeetingID=802&id=113518

  10. 10
    Academic Journal

    المصدر: Journal of Applied Physics; Jun2010, Vol. 107 Issue 10, p103707-103714, 7p, 2 Charts, 8 Graphs

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    Academic Journal

    المصدر: Journal of Applied Physics. Aug2009, Vol. 106 Issue 4, p043706-043712. 7p. 3 Charts, 4 Graphs.

  12. 12
    Academic Journal

    المساهمون: Biundo, R., Weis, L., Fiorenzato, E., Gentile, G., Giglio, M., Schifano, R., Campo, M. C., Marcon, V., Martinez-Martin, P., Bisiacchi, P., Antonini, A.

    مصطلحات موضوعية: Parkinson patients, tDCS, MCI

    وصف الملف: ELETTRONICO

    Relation: info:eu-repo/semantics/altIdentifier/pmid/26319357; info:eu-repo/semantics/altIdentifier/wos/WOS:000368087700030; volume:8; issue:6; firstpage:1223; lastpage:1225; numberofpages:3; journal:BRAIN STIMULATION; http://hdl.handle.net/11577/3359078; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84955628002

  13. 13
    Academic Journal

    المؤلفون: Paskov, P. P.1 lapa@ifm.liu.se, Schifano, R.1, Monemar, B.1, Paskova, T.2, Figge, S.2, Hommel, D.2

    المصدر: Journal of Applied Physics. 11/1/2005, Vol. 98 Issue 9, p093519. 7p. 1 Diagram, 7 Graphs.

  14. 14
    Academic Journal

    المساهمون: National Science Center, National Science Center of Poland, EU 7th Framework Program, National Laboratory of Quantum Technologies, Statutory

    المصدر: Solar Energy Materials and Solar Cells ; volume 147, page 164-170 ; ISSN 0927-0248

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    المصدر: Physica Status Solidi. C, Current topics in solid state physics. 6:1499-1502

    مصطلحات موضوعية: NATURAL SCIENCES, NATURVETENSKAP

    وصف الملف: print

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    Academic Journal
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    Academic Journal

    المساهمون: EU 7th Framework Program, Polish National Center for Research and Development

    المصدر: Applied Physics Letters ; volume 107, issue 10 ; ISSN 0003-6951 1077-3118

  19. 19
    Academic Journal

    المساهمون: Giammanco, S., Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia, Parello, F., DFCTA, University of Palermo, Gambardella, B., Dip.Ter.Ris., University of Genova, Schifano, R., Pizzullo, S., Galante, G., Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia, #PLACEHOLDER_PARENT_METADATA_VALUE#

    وصف الملف: application/pdf

    Relation: Journal of Volcanology and Geothermal Research; 165 (2007); AA. VV., 1983. Catalogo dei terremoti italiani nel periodo 1000–1980. Open File Report. ENEL, Italy. Adam, J., Reuther, C.-D., Grasso, M., Torelli, L., 2000. Active fault kinematics and crustal stresses along the Ionian margin of southeastern Sicily. Tectonophysics 326, 217–239. Aiuppa, A., Allard, P., D'Alessandro, W., Giammanco, S., Parello, F., Valenza, M., 2004. Magmatic gas leakage at Mount Etna (Sicily, Italy): relationships with the volcano-tectonic structures, the hydrological pattern and the eruptive activity. In: Bonaccorso, A., Calvari, S., Coltelli, M., Del Negro, C., Falsaperla, S. (Eds.), Mt. Etna: Volcano Laboratory. American Geophysical Union, Washington, DC, pp. 129–145. doi:10.1029/143GM09. Allard, P., Carbonelle, J., Dajlevic, D., Le bronec, J., Morel, P., Robe, M.C., Maurenas, J.M., Faivre-Pierret, R., Martin, D., Sabroux, J.C., Zettwoog, P., 1991. Eruptive and diffuse emissions of CO2 from Mount Etna. Nature 351, 387–391. Allard, P., Jean-Baptiste, P., D'Alessandro, W., Parello, F., Parisi, B., Flehoc, C., 1997. Mantle-derived helium and carbon in groundwaters and gases of Mount Etna, Italy. Earth Planet. Sci. Lett. 148, 501–516. Angell, R.F., Svejcar, T., Bates, J., Saliendra, N.Z., Johnson, D.A., 2001. Bowen ratio and closed chamber carbon dioxide flux measurements over sagebrush steppe vegetation. Agric. For. Meteorol. 108 (2), 153–161. Angelone, M., Gasparini, C., Guerra, M., Lombardi, S., Pizzino, L., Quattrocchi, F., Sacchi, E., Zuppi, G.M., 2005. Fluid geochemistry of the Sardinian Rift-Campidano Graben (Sardinia, Italy): fault segmentation, seismic quiescence of geochemically “active” faults, and new constraints for selection of CO2 storage sites. Appl. Geochem. 20, 317–340. Barberi, F., Civetta, L., Gasparini, P., Innocenti, F., Scandone, R., Villari, L., 1974. Evolution of a section of the Africa–Europe plate boundary: paleomagnetic and volcanology evidence from Sicily. Earth Planet. Sci. Lett. 22, 123–132. Baubron, J.-C.,Allard, P., Toutain, J.P., 1990. Diffuse volcanic emissions of carbon dioxide from Volcano Island. Nature 350, 26–27. Baubron, J.-C., Allard, P., Toutain, J.P., 1991. Gas hazard on Volcano Island, Italy. Nature 344, 51–53. Behncke, B., 2004. Late Pliocene volcanic island growth and flood basalt-like lava emplacement in the Hyblean Mountains (SE Sicily). J. Geophys. Res. 109, B09201. doi:10.1029/2003JB002937. Berner, E.K., Berner, R.A., 1996. Global Environment:Water; Air, and Geochemical Cycles. Prentice Hall, Upper Saddle River. Bonfanti, P., Carapezza, M.L., D'Alessandro, W., De Domenico, R., Diliberto, I., Di Liberto, R., Giammanco, S., Gurrieri, S., Parello, F., Valenza, M., 1995. Earthquake of December 13, 1990 in eastern Sicily: Some geochemical investigations. Proc. Int. Sci. Meeting Seismic Protection, Venezia, Italy, pp. 176–184. Branca, S., Coltelli, M.,Groppelli,G., 2004.Geological evolution of Etna volcano. In: Bonaccorso, A., Calvari, S., Coltelli, M., Del Negro, C., S. Giammanco et al. / Journal of Volcanology and Geothermal Research 165 (2007) 46–63 61 Falsaperla, S. (Eds.), Mt. Etna: Volcano Laboratory. American Geophysical Union, Washington, DC, pp. 49–63. Capasso, G., Inguaggiato, S., 1998. A simple method for the determination of dissolved gases in natural waters. An application to thermal waters from Vulcano Island. Appl. Geochem. 13, 631–642. Caracausi, A., Favara, R., Giammanco, S., Italiano, F., Nuccio, P.M., Paonita, A., Pecoraino, G., Rizzo, A., 2003a. Mount Etna: geochemical signals ofmagma ascent and unusually extensive plumbing system. Geophys. Res. Lett. 30, 1057–1060. doi:10.1029/ 2002GL015463. Caracausi, A., Italiano, F., Nuccio, P.M., Paonita, A., Rizzo, A., 2003b. Evidence of deep magma degassing and ascent by geochemistry of peripheral gas emissions at Mount Etna (Italy): assessment of the magmatic reservoir pressure. J. Geophys. Res. 108 (B10), 2463. doi:10.1029/2002JB002095. Carapezza, M.L., Federico, C., 2000. The contribution of fluid geochemistry to the volcano monitoring of Stromboli. J. Volcanol. Geotherm. Res. 95, 227–245. Carbone, S., Grasso, M., Lentini, F., 1987. Lineamenti geologici del Plateau Ibleo (Sicilia SE). Presentazione delle carte geologiche della Sicilia sud-orientale. Mem. Soc. Geol. Ital. 38, 127–135. Cardellini, C., Frondini, F., Gambardella, B., Morgantini, N., in press. Flussi di CO2 dal suolo nell’area di Muravera. In: Ottonello, G. (Ed.), Monografia sui risultati del progetto GEOBASI. Catalano, S., Torrisi, S., Ferlito, C., 2004. The relationship between Late Quaternary deformation and volcanism of Mt. Etna (eastern Sicily): new evidence from the sedimentary substratum in the Catania region. J. Volcanol. Geotherm. Res. 132, 311–334. Chester, D.K., Duncan, A.M., Guest, J.E., Kilburn, C.R.J., 1985. Mount Etna: the Anatomy of a Volcano. Chapman and Hall, London. Chiodini, G., Frondini, F., 2001. Carbon dioxide degassing from the Albani Hills volcanic region, Central Italy. Chem. Geol. 177, 67–83. Chiodini, G., Frondini, F., Raco, B., 1996a. Diffuse emission of CO2 from the Fossa crater, Vulcano Island (Italy). Bull. Volcanol. 58, 41–50. Chiodini, G., D'Alessandro, W., Parello, F., 1996b. Geochemistry of gases and waters discharged by the mud volcanoes at Paternò, Mt. Etna (Italy). Bull. Volcanol. 58, 51–58. Chiodini, G., Cioni, R., Guidi, M., Raco, B., Marini, L., 1998. Soil CO2 flux measurements in volcanic and geothermal areas. Appl. Geochem. 13, 135–148. Chiodini,G., Cardellini, C., Frondini, F., 2002.Deep CO2 emission in Italy: a review. In:Marini, L., Ottonello, G., Buccianti, A., Vaselli, O. (Eds.), Proc. Seminar Fluids Geochemistry, Arezzo, Italy, pp. 188–199. Condomines, M., Tanguy, J., Michaud, V., 1995. Magma dynamics at Mt. Etna—Constraints from U–Th–Ra–Pb radioactive disequilibria and Sr isotopes in historical lavas. Earth Planet. Sci. Lett. 132, 25–41. Crescenzi, S., Petrocchi, B., 1954. Le manifestazioni d'idrocarburi in Sicilia. Riv. Min. Sicil. 28–29, 159–172. D'Alessandro, W., De Domenico, R., Parello, F., Valenza, M., 1995. Geochemical anomalies in the gaseous phase of the mud volcanoes of Paternò — Sicily. Proc. Int. Sci. Meeting Seismic Protection, Venezia, Italy, pp. 171–175. D'Alessandro, W., Parello, F., Valenza, M., 1996. Gas manifestations of Mount Etna area: historical notices and new geochemical data (1990–1993). Acta Vulcanol. 8 (1), 23–29. D'Alessandro,W., De Gregorio, S., Dongarrà, G., Gurrieri, S., Parello, F., Parisi, B., 1997a. Chemical and isotopic characterization of the gases of Mount Etna (Italy). J.Volcanol. Geotherm. Res. 78, 65–76. D'Alessandro, W., Giammanco, S., Parello, F., Valenza, M., 1997b. CO2 output and δ13C(CO2) from Mount Etna as indicators of degassing of shallow asthenosphere. Bull. Volcanol. 58, 455–458. David, M., 1977. Geostatistical Ore Reserve Estimation. Elsevier Sci, New York. De Gregorio, S., Diliberto, I.S., Giammanco, S., Gurrieri, S., Valenza, M., 2002. Tectonic control over large-scale diffuse degassing in eastern Sicily (Italy). Geofluids 2, 273–284. Etiope, G., 1999. Subsoil CO2 and CH4, and their advective transfer from faulted grassland to the atmosphere. J. Geophys. Res. 104, 16889–16894. Favara, R., Giammanco, S., Inguaggiato, S., Pecoraino, G., 2001. Preliminary estimate of CO2 output from Pantelleria Island volcano (Sicily, Italy): evidence of active mantle degassing. Appl. Geochem. 16, 883–894. Ferrara, F., 1805. Memoria sopra il lago de' Palici ora lago Naftía in Sicilia, Palermo. Frank, A.B., Liebig, M.A., Hanson, J.D., 2002. Soil carbon dioxide fluxes in northern semiarid grasslands. Soil Biol. Biochem. 34, 1235–1241. Gambardella, B., Cardellini, C., Frondini, F., Donnini, M., Sorrenti, D., Cipolli, F., Vetuschi Zuccolini, M., 2006. Studi preliminari sui flussi di CO2 dal suolo nel Foglio 549 Muravera. Proc. Meet. Progetto GEOBASI: workshop di medio termine, Casaccia, Italy, pp. 43–46. Giammanco, S., Gurrieri, S., Valenza, M., 1995. Soil CO2 degassing on Mt. Etna (Sicily) during the period 1989–1993: discrimination between climatic and volcanic influences. Bull. Volcanol. 57, 52–60. Giammanco, S., Gurrieri, S., Valenza, M., 1997. Soil CO2 degassing along tectonic structures of Mount Etna (Sicily): the Pernicana fault. Appl. Geochem. 12, 429–436. Giammanco, S., Inguaggiato, S., Valenza, M., 1998a. Soil and fumarole gases of Mount Etna: geochemistry and relations with volcanic activity. J. Volcanol. Geotherm. Res. 81, 297–310. Giammanco, S., Gurrieri, S., Valenza, M., 1998b. Anomalous soil CO2 degassing in relation to faults and eruptive fissures on Mount Etna (Sicily, Italy). Bull. Volcanol. 60, 252–259. Gillot, P.-Y., Kieffer, G., Romano, R., 1994. The evolution of Mount Etna in the light of potassium–argon dating. Acta Vulcanol. 5, 81–87. Goovaerts, P., 1997. Geostatistics for natural resources evaluation. Oxford University Press, New York. Grassa, F., Capasso, G., Faber, E., Inguaggiato, S., Valenza, M., 2004. Molecular and isotopic composition of free hydrocarbon gases from Sicily, Italy. Geophys. Res. Lett. 31, L06607. doi:10.1029/ 2003GL019362. Grasso, M., Lentini, F., Nairn, A.F.M., Vigliotti, L., 1983. A geological and paleomagnetic study of the Hyblean volcanic rocks Sicily. Tectonophysics 98, 271–295. Guest, J.E., Duncan, A.M., 1981. Internal plumbing of Mount Etna. Nature 290, 584–586. Gurenko, A.A., Schmincke, H.U., 2002. Orthopyroxene-bearing tholeiites of the Iblean Plateau (Sicily): constraints on magma origin and evolution from glass inclusions in olivine and orthopyroxene. Chem. Geol. 183, 305–331. Hinkle, M., 1990. Factors affecting concentrations of helium and carbon dioxide in soil gases. In: Geochemistry of gaseous elements and compounds. In: Durrance, E.M., Galimov, E.M., Hinkle, M.E., Reimer, G.M., Sugisaki, R., Augustithis, S.S. (Eds.), Geochemistry of gaseous elements and compounds. Theophrastus Publications, Athens, pp. 421–448. 62 S. Giammanco et al. / Journal of Volcanology and Geothermal Research 165 (2007) 46–63 Hirn, A., Nicolich, R., Gallart, J., Laigle, M., Cernobori, L., 1997. Roots of Etna volcano in faults of great earthquakes. Earth Planet. Sci. Lett. 148, 171–191. Irwin, W.P., Barnes, I., 1980. Tectonic relations of Carbon Dioxide discharges and earthquakes. J. Geophys. Res. 85, 3115–3121. Italiano, F., Martelli, M., Martinelli, G., Nuccio, P.M., 2000. Geochemical evidence of melt intrusions along lithospheric faults of the Southern Apennines, Italy: geodynamic and seismogenic implications. J. Geophys. Res. 105, 13569–13578. Keeling, C.D., Whorf, T.P., 2005. Atmospheric CO2 records from sites in the SIO air sampling network. Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center. Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A. http://cdiac.ornl.gov/trends/co2/sio-mlo.htm. Kerrick, D.M., 2001. Present and past nonanthropogenic CO2 degassing from the solid Earth. Rev. Geophys. 39 (4), 565–585. La Scala, N., Marques, J., Pereira, G.T., Cora, J.E., 2000. Short-term temporal changes in the spatial variability model of CO2 emissions from a Brazilian bare soil. Soil Biol. Biochem. 32, 1459–1462. Lentini, F., 1982. The geology of Mt. Etna basement. Mem. Soc. Geol. Ital. 23, 7–25. Maestre, F.T., Cortina, J., 2003. Small-scale spatial variation in soil CO2 efflux in a Mediterranean semiarid steppe. Appl. Soil Ecol. 23, 199–209. Marty, B., Trull, T., Lussiez, P., Basile, I., Tanguy, J.C., 1994. He, Ar, O, Sr and Nd isotope constraints on the origin and evolution of Mount Etna magmatism. Earth Planet. Sci. Lett. 126, 23–39. Mielnick, P.C., Dugas,W.A., 2000. Soil CO2 flux in a tallgrass prairie. Soil Biol. Biochem. 32, 221–228. Mörner, N.-A., Etiope, G., 2002. Carbon degassing from the lithosphere. Glob. Planet. Change 33, 185–203. Mulargia, F., Broccio, F., Achilli, V., Baldi, P., 1985. Evaluation of a seismic quiescence pattern in southeast Sicily. Tectonophysics 116, 335–364. Obrist, D., Delucia, E.H., Arnone III, J.A., 2003. Consequences of wildfire on ecosystems CO2 and water vapour fluxes in the Great Basin. Glob. Chang. Biol. 9, 563–574. Parello, F., D'Alessandro, W., Bonfanti, P., Dongarrà, G., 1995. Subsurface gases in selected sites of the Mt. Etna area (Sicily). Acta Vulcanol. 7 (1), 35–42. Pecoraino, G., Giammanco, S., 2005. Geochemical characterization and temporal changes in parietal gas emissions at Mt. Etna (Italy) during the period July 2000–July 2003. Terr., Atmos. Ocean. Sci. 16, 805–841. Ponte, G., 1919. Le sorgenti di anidride carbonica e la loro importanza industriale. La Sicilia Industriale, I, 10, Catania 13 Giugno 1919. Ponte, G., 1934. La Mofeta dei Palici e la sua utilizzazione. Boll. Soc. Geol. Ital. 53, 69–76. Raich, J.W., Schlesinger, W.H., 1992. The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate. Tellus 44B, 81–99. Raich, J.W., Tufekcioglu, A., 2000. Vegetation and soil respiration: correlations and controls. Biogeochemistry 48, 71–90. Raich, J.W., Potter, C.S., Bhagawati, D., 2002. Interannual variability in global soil respiration, 1980–94. Glob. Chang. Biol. 8, 800–812. Reth, S., Gockede, M., Falge, E., 2005. CO2 efflux from agricultural soils in Eastern Germany — comparison of a closed chamber system with eddy covariance measurements. Theor. Appl. Climatol. 80, 105–120. Rogie, J.D., Kerrick, D.M., Chiodini, G., Frondini, F., 2000. Flux measurements of nonvolcanic CO2 emissions from some vents in central Italy. J. Geophys. Res. 105, 8435–8445. Schmincke, H.U., Behncke, B., Grasso, M., Raffi, S., 1997. Evolution of the northwestern Iblean Mountains, Sicily: uplift, Plicocene/ Pleistocene sea-level changes, paleoenvironment, and volcanism. Geol. Rundsch. 86, 637–669. Sharp, A.D.L., Davis, P.M, Gray, F., 1980. A low velocity zone beneath Mount Etna and magma storage. Nature 287, 587–591. Silvestri, O., 1866. Le salse e la eruzione di fango di Paternò (Sicilia)— Osservazioni e ricerche. Stabilimento Tipografico C. Galatola, Catania, Italy. 30 pp. Silvestri, O., 1878. Importante eruzione di fango comparsa a Paternò nelle adiacenze dell'Etna ai primi di dicembre 1878. Boll. Vulcanol. It. 5, 131–132. Sinclair, A.J., 1974. Selection of thresholds in geochemical data using probability graphs. J. Geochem. Explor. 3, 129–149. Tonani, F., Miele, G., 1991. Methods for measuring flow of carbon dioxide through soils in the volcanic setting. Istituto di Analisi Globale e Applicazioni C.N.R., Firenze, Italy. Toutain, J.-P., Baubron, J.-C., 1999. Gas geochemistry and seismotectonics: a review. Tectonophysics 304, 1–27. Trua, T., Laurenzi, M.A., Oddone, M., 1997. Geochronology of the Plio-Pleistocene Hyblean volcanism (SE Sicily): new 40Ar/39Ar data. Acta Vulcanol. 9, 167–176. Vetuschi Zuccolini, M., Gambardella, B., Giammanco, S., Schifano, R., in preparation. Role of sites distribution, soil characteristics and types of tillage on geostatistical estimators for soil CO2 effluxes.

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