Earl JE, Hoch AZ. A Proximal Strengthening Program Improves Pain, Function, and Biomechanics in Women With Patellofemoral Pain Syndrome. Am J Sports Med. 2010 Oct 7. [Epub ahead of print].
Bhave A, Baker E. Prescribing quality patellofemoral rehabilitation before advocating operative care. Orthop Clin North Am. 2008 Jul;39(3):275-85.