Autor:	The George Washington University Problems Group, Nieto, José H., Marghidanu, Dorin, Botsko, Michael W., Lockhart, Jody M., Wardlaw, William P., Furdui, Ovidiu, Bataille, Michel, Gerber, Leon, Woltermann, Michael, Jacobson, Richard A., Kutsenok, Victor Y., Curtis, Chip, Gosnell, Will, Bailey, Herb, Singer, Nicholas C., Poon, Yiu Tung
Zdroj:	Mathematics Magazine, 2008 Oct 01. 81(4), 303-309.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/27643130 Zobrazit plný text záznamu