Silva, D.A.S., Silva, R.J. dos S. and Petroski, E.L. 2010. <b>Sedentary behavior during school recess and association with sociodemographic factors</b&gt; - doi: 10.4025/reveducfis.v21i2.8321. Journal of Physical Education . 21, 2 (Jun. 2010), 255-261.