Maurer, B., Stern, A., Kinossian, B., Cook, K., & Schumacher, H. (1999). Osteoarthritis of the knee: Isokinetic quadriceps exercise versus an educational intervention. Archives of physical medicine and rehabilitation, 80(10), S. 1293-1299.

Maurer, B.T., A.G Stern, B. Kinossian, K.D Cook, and H.R Schumacher. "Osteoarthritis of the Knee: Isokinetic Quadriceps Exercise Versus an Educational Intervention." Archives of Physical Medicine and Rehabilitation 80, no. 10 (1999): S. 1293-1299.

Maurer, B.T., et al. "Osteoarthritis of the Knee: Isokinetic Quadriceps Exercise Versus an Educational Intervention." Archives of Physical Medicine and Rehabilitation 80.10 (1999): S. 1293-1299.