1. Torg JS and Quedenfeld TC: Effect of Shoe Type and Cleat Length on the Incidence and Severity of Knee Injuries Among Philadelphia High School Football Players. Research Quarterly, 42: 203-211, 1971
2. Nedwidek RA: Knee and ankle injuries: Articulating opinion with research. Scholastic Coach 18-20, January, 1969
3. Hafner JK: A Statewide Study Designed to Determine Methods of Reducing Injury in Interscholastic Football Competition by Equipment Modification. NYSPHSSA Report , June, 1972
4. The swivel football shoe: A controlled study
5. Torg JS and Quedenfeld T.: Knee and ankle Injuries Traced to Shoes and Cleats. Physician and Sportsmed 1: 39-43, September, 1973