Autor:	Sastry, K. R. S., Schmidt, Frank, Shan, Zun, Mombelli, Juan Martin, Zimmerman, Seth, Trenkler, G., Troschke, S. O., Grob, J., Puntanen, S., Duemmel, James, Rosenberg, Noah, Penney, David E., Eynden, Thomas Vanden, Schumer, Peter, Mazzarello, Giovanni, Korbin, Ken, Zerger, Monte J.
Zdroj:	The College Mathematics Journal, 1998 Sep 01. 29(4), 330-336.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/2687695 Zobrazit plný text záznamu