Buddy Ryan, Combative Defensive Genius in the N.F.L., Dies at 85 - The New York Times
Uncle Mike's Musings: A Yankees Blog and More: My All-Half-Century Team
What years did the Bears go to the Superbowl? - Quora
Peter Bogdanovich, director of 'Paper Moon' and 'Last Picture Show,' dies at 82
Buddy Ryan, NFL coach and defensive mastermind, dies at 82
Buddy Ryan, Eagles coach and NFL defensive mastermind, dies at 85 – The Morning Call
Buddy Ryan's defensive brilliance still evident in today's NFL
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
Buddy Ryan dead: Former NFL coach dies at 82 - Sports Illustrated
Read Buddy Ryan's letter to the 1985 Chicago Bears - ESPN - Chicago Bears Blog- ESPN