Freitas, G. da S., L. C. Rigo, and D. V. da Silva. “<b>Considerations about Migration, the Double Citizenship and Naturalization Os Football players</b&gt; - Doi: 10.4025/reveducfis.V23i3.15381”. Journal of Physical Education , Vol. 23, no. 3, Sept. 2012, pp. 457-68, https://periodicos.uem.br/ojs/index.php/RevEducFis/article/view/15381.