"The Most Instructive Games of Chess Ever Played : 62 Masterpieces of Chess Strategy". Book by Irving Chernev, Game 18 : The Isolated Pawn (p. 81), 1965.
"The Top Chess Player In The World Impressed The Heck Out Of Everyone At This NYC Exhibition". Interview with Gus Lubin, www.businessinsider.com. September 4, 2012.