Dean Campbell - Defensive Back Man Coverage Techniques: Skills and Drills
(2011) Strategy
Eric Kellar - Nontraditional Exercises to Improve Athletic Performance: Lifts, Agilities, Tests, and Games
Anthony Glass - Agility Drills for Improved Athletic Performance
Dale Boring - Get Fast®: Developing Position-Specific Agility for Football
Greg Hacker - Off-Season Speed/Agility/Quickness/Explosion Training for the Highly Competitive Athlete