Muthalib, M., G. Kerr, K. Nosaka, and S. Perrey. “Local Muscle Metabolic Demand Induced by Neuromuscular Electrical Stimulation and Voluntary Contractions at Different Force Levels: A NIRS Study”. European Journal of Translational Myology, vol. 26, no. 2, June 2016, doi:10.4081/ejtm.2016.6058.