المؤلفون: Agapov, Yu. P., Drozhenko, V. G., Dudin, V. I., Mihkailov, V. N.

المصدر: Soviet Journal of Low Temperature Physics ; volume 1, issue 4, page 212-215 ; ISSN 0360-0335

الاتاحة: http://dx.doi.org/10.1063/10.0029073
https://pubs.aip.org/aip/ltp/article-pdf/1/4/212/20245374/212_1_10.0029073.pdf