S. S. Gomes, R. Miranda, M. G. Bara Filho, and M. R. F. Brandão, “<b>Flow in volleyball: relationship with motivation, self-efficacy, perceived ability and goal orientation</b&gt; - doi: 10.4025/reveducfis.v23i3.17024”, JPhysEduc, vol. 23, no. 3, pp. 379-387, Sep. 2012.