Spanias, Charalampos, Christopher Kirk, and Karsten Øvretveit. “Position before submission? Techniques and tactics in competitive no-gi Brazilian jiu-jitsu”. Revista de Artes Marciales Asiáticas 17, no. 2 (December 20, 2022): 130–139. Accessed April 21, 2024. https://revistas.unileon.es/ojs/index.php/artesmarciales/article/view/7410.