Baptista, Marco Túlio, et al. “ Influence of Knee Positions on Torque and Myoelectric Activity of Triceps Surae at Maximum Isometric Plantar Flexion ”. Brazilian Journal of Physical Education and Sport, vol. 28, no. 2, Apr. 2014, pp. 197-02, https://doi.org/10.1590/1807-55092014000200197.