Pietrosimone, B. G., Selkow, N. M., Ingersoll, C. D., Hart, J. M., & Saliba, S. A. (2011). Electrode type and placement configuration for quadriceps activation evaluation. Journal of athletic training, 46(6), S. 621-628. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3418939/

Pietrosimone, Brian G., Noelle M. Selkow, Christopher D. Ingersoll, Joseph M. Hart, and Susan A. Saliba. "Electrode Type and Placement Configuration for Quadriceps Activation Evaluation." Journal of Athletic Training 46, no. 6 (2011): S. 621-628.

Pietrosimone, Brian G., et al. "Electrode Type and Placement Configuration for Quadriceps Activation Evaluation." Journal of Athletic Training 46.6 (2011): S. 621-628.