Autor:	Montgomery, Peter L., Meserve, Bruce E., Wayne, Alan, Binz, J. C., James, Glenn D., Brenner, Joel, Schenkman, Eugene, Wetzel, John E., Staib, John, Boas, R. P.
Zdroj:	Mathematics Magazine, 1976 Mar 01. 49(2), 102-106.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/2689445 Zobrazit plný text záznamu