Gutiérrez García, Carlos. “The empty mind. The Spirit and Philosophy of Martial Arts”. Revista de Artes Marciales Asiáticas 1, no. 3 (July 17, 2012): 87–88. Accessed October 5, 2024. https://revpubli.unileon.es/ojs/index.php/artesmarciales/article/view/261.