[1]
Lizardo, F.B. et al. 2018. Electromyography of the abdominal muscles and rectus femoris in abdominal exercises with and without the unstable surfaces. Brazilian journal of physical education and sport. 32, 2 (Dec. 2018), 171–180. DOI:https://doi.org/10.11606/1807-5509201800020171.