Autor:	Tee, Harry, Bulkin, Bernard J, Poku, Ernie, Hewlett, Mark, Jones, Emeritus Charles, Taylor, Cyril, Burcher, Michael, Wilson, David, Wilkinson, Stephen
Zdroj:	RSA Journal, 2006 Apr 01. 153(5522), 10-13.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41379674