Blomqvist Mickelsson, Tony, and Vince Shaw. “Performance increments without audience: paired data from mixed martial arts fighters during COVID-19”. Revista de Artes Marciales Asiáticas 15, no. 2 (December 2, 2020): 50–58. Accessed December 23, 2024. https://revistas.unileon.es/index.php/artesmarciales/article/view/6294.