Mateu, Pau, and Eduard Inglés. “Relationship between sport participation and attendance at sporting events. A case study on the judo in Spain”. Revista de Artes Marciales Asiáticas 11, no. 2 (December 30, 2016): 99–111. Accessed April 19, 2024. https://revistas.unileon.es/ojs/index.php/artesmarciales/article/view/4785.