E-viri
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Horten, William; Shapiro, Daniel B.; Klamkin, M. S.; Hearon, John Z.; Creech, Roger L.; Friedlander, Stanley; Primer, Jeremy D.; Propp, James; Woltermann, Michael; Nicely, Thomas R.; Schumer, Peter; Wildenberg, Gerald; Heuer, G. A.; Dowds, Richard; Ricci, Steve; McWorter, William A.; Gustafson, William H.; Brown, Kenneth A.
Mathematics magazine, 01/1982, Letnik: 55, Številka: 1Magazine Article
