Silva, António Lopes, and António Quaresma. “Motivation and martial arts and combat sports participation: a study protocol”. Revista de Artes Marciales Asiáticas 14, no. 2s (November 18, 2019): 34–36. Accessed May 24, 2024. https://revistas.unileon.es/ojs/index.php/artesmarciales/article/view/6011.