Walker, N. A., Denegar, C. R., & Preische, J. (2007). Low-intensity pulsed ultrasound and pulsed electromagnetic field in the treatment of tibial fractures: A systematic review. Journal of athletic training, 42(4), S. 530-535. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140080/

Walker, Nicol A., Craig R. Denegar, and Jody Preische. "Low-intensity Pulsed Ultrasound and Pulsed Electromagnetic Field in the Treatment of Tibial Fractures: A Systematic Review." Journal of Athletic Training 42, no. 4 (2007): S. 530-535.

Walker, Nicol A., Craig R. Denegar, and Jody Preische. "Low-intensity Pulsed Ultrasound and Pulsed Electromagnetic Field in the Treatment of Tibial Fractures: A Systematic Review." Journal of Athletic Training 42.4 (2007): S. 530-535.