[1] Hegedus, Eric J; Goode, Adam; Butler, Robert J; Slaven, Emily. The neurophysiological effects of a single session of spinal joint mobilization: does the effect last? Journal of Manual & Manipulative Therapy, Volume 19, Number 3, 2011, pp. 143-151(9)
[2] Zatsiorsky, Vladimir; Kraemer, William (2006). "Experimental Methods of Strength Training". Science and Practice of Strength Training. Human Kinetics. pp. 132–133. ISBN 978-0-7360-5628-1.
[3] Examples of peer-reviewed research articles attesting increased muscular performance by utilizing EMS:[improper synthesis? lt, Nicolas; Cometti, Gilles; Bernardin, Michel; Pousson, Michel; Chatard, Jean-Claude (2007). "Effects of Electromyostimulation Training on Muscle Strength and Power of Elite Rugby Players". The Journal of Strength and Conditioning Research. 21 (2): 431. doi:10.1519/R-19365.1.
[4]D; Cattaneo, F; Dugnani, S; Maffiuletti, NA (2003). "Effects of electromyostimulation training and volleyball practice on jumping ability". Journal of strength and conditioning research. 17 (3): 573–9. PMID 12930189. doi:10.1519/00124278-200308000-00025
[5] Pellecchia GL et al. Lumbar traction: A review of the literature. J Orthop Sports Phys Ther. 1994 Nov;20(5):262-267. (LEVEL 1A)