Ronald L. Graham, Donald Ervin Knuth, Oren Patashnik (1989). “Concrete mathematics: a foundation for computer science”, Addison Wesley Publishing Company
"60 Minutes Promotes Washington's 1098 Income Tax Initiative, Stahl Hails Stockman as 'Brave' for Wanting Tax Hikes" by Brent Baker, www.newsbusters.org. November 1, 2010.