New York Times, New York, New York, Friday, May 24, 1963 - Page 23
Petrosian Reports Skiing Helped Him Win Chess Crown
“…Petrosian said he was specializing in logic in his philosophy studies and planned to write his dissertation on the logic of chess.
He refused to predict who would be the possible challenger in the next title match in 1966, but he termed Bobby Fischer of New York ‘among most dangerous.’”