Autor:	G.R.A.20 Problem Solving Group, Hajja, Mowaffaq, ShahAli, H. A., Trenkler, Götz, Marghidanu, Dorin, Groah, Jeff, Botsko, Michael W., Furdui, Ovidiu, Mouroukos, Evangelos, Ricardo, Henry J., Can, Minh, Christopher, John, Bataille, Michel, Bradie, Brian, Armstrong, Scott N.
Zdroj:	Mathematics Magazine, 2008 Apr 01. 81(2), 155-161.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/27643098 Zobrazit plný text záznamu