Silva, Alberto Inácio da, and Ciro Romelho Rodriguez-Añez. “The Cardiac Rate and the Intensity of the Physical Activity of the Assistant Referee During a Soccer Match”. Journal of Physical Education (Maringá) 14, no. 1 (May 28, 2008): 53-57. Accessed December 27, 2025. https://periodicos.uem.br/ojs/index.php/RevEducFis/article/view/3642.