Freitas, Gustavo da Silva, Luiz Carlos Rigo, and Daniel Vidinha da Silva. 2012. “<b>Considerations about Migration, the Double Citizenship and Naturalization Os Football players</b&gt; - Doi: 10.4025/reveducfis.V23i3.15381”. Journal of Physical Education 23 (3), 457-68. https://periodicos.uem.br/ojs/index.php/RevEducFis/article/view/15381.