Souza Filho, M. J., Albuquerque, M. R., Costa, I. T., Malloy-Diniz, L. F. and Costa, V. T. (2017) “Comparison of the motivation level of soccer players with high and low played time in matches Under-20”, Journal of Physical Education , 29(1), p. e-2911. doi: 10.4025/jphyseduc.v29i1.2911.