Cresswell A.G, et al : Observations on intra- abdominal pressure and patterns of abdominal intra-muscular activity in man. Acta Physiologica Scandinavica , 144 (4): 409-418, 1992
De Troyer A, et al : Transversus abdominis muscle function in humans. Journal of Applied Physiology (Bethesda,Md:1985) ,68(3): 1010-1016, 1990
Hides, J. a, Belavý, D. L., Stanton, W., Wilson, S. J., Rittweger, J., Felsenberg, D., & Richardson, C. a. : Magnetic resonance imaging assessment of trunk muscles during prolonged bed rest. Spine, 32(15), 1687-92.2007