Shelbourne K, Clark M, & Gray T. (2013). Minimum 10-year follow-up of patients after an acute, isolated posterior cruciate ligament injury treated nonoperatively. The American Journal of Sports Medicine, 41(7): 1526-1533.
DeLee, Jesse C., David Drez, and Mark D. Miller, Orthopaedic Sports Medicine: Principles and Practice, Philadelphia, Pa: Saunders; 3rd ed, 2009.
Peterson C. Posterior Cruciate Ligament Injury. Medscape Reference. http://emedicine.medscape.com/article/90514-overview. Updated Feb 28, 2014. Accessed May 2016.