D. A. S. Silva, R. J. dos S. Silva, and E. L. Petroski, “<b>Sedentary behavior during school recess and association with sociodemographic factors</b&gt; - doi: 10.4025/reveducfis.v21i2.8321”, JPhysEduc, vol. 21, no. 2, pp. 255-261, Jun. 2010.