المؤلفون: Shallit, Jeffrey, Johnson, Paul B., Zwillinger, Daniel, Portz, Bernard J., Selfridge, J. L., Dennin,, Joseph B., Gibbs, Richard A.

المصدر: Mathematics Magazine, 1976 May 01. 49(3), 155-158.

URL الوصول: https://www.jstor.org/stable/2690200

المؤلفون: Demir, Huseyin, Just, Erwin, Sivaramakrishnan, R., Rabinowitz, Stanley, Edgar, Hugh M., Avery, Chris W., Pollatchek, Albert E., Breisch, Richard L., Aheart, Andrew N., Chand, Donald, Chaoultea, Charles, Kuttler, J. R., Dodds, Gerald C., Haverstick, Philip, Lindstrom, Peter A., Portz, Bernard J., Ricardo, Henry J., Schleusner, John W., Schmeichel, E. F., Trigg, Charles W., Wardrop, R. F., Farrand, Rosalie, Reich, Simeon, Goldberg, Michael, Trigg, Charles W., Beane, Donald, Schmeichel, E. F., Kohler, Alfred, O'Shaughnessy, C. D., Corliss, George F., Dodes, Irving A., Knight, Bill, Agargun, Mehmet, Thomas, P. D., Howell, John M., Mosteller, Frederick, Baum, John D., Flanders, Harley, Schmeichel, E. F., Penney, Walter, Thompson, Graham C., Pantelidakis, P. G.

المصدر: Mathematics Magazine, 1970 Mar 01. 43(2), 102-97.

URL الوصول: https://www.jstor.org/stable/2688983

المؤلفون: Shallit, Jeffrey, Barz, Theresa J., Johnson, Paul B., Zwillinger, Daniel, Portz, Bernard J., Selfridge, J.L., Dennin, Joseph B., Gibbs, Richard A.

المصدر: Mathematics Magazine ; volume 49, issue 3, page 155-158 ; ISSN 0025-570X 1930-0980

الاتاحة: https://doi.org/10.1080/0025570x.1976.11976569
https://www.tandfonline.com/doi/pdf/10.1080/0025570X.1976.11976569

المؤلفون: Portz, Bernard J.

المصدر: School Science and Mathematics ; volume 55, issue 4, page 312-314 ; ISSN 0036-6803 1949-8594

الاتاحة: http://dx.doi.org/10.1111/j.1949-8594.1955.tb12898.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1949-8594.1955.tb12898.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1949-8594.1955.tb12898.x