GUTIÉRREZ GARCÍA, C. The empty mind. The Spirit and Philosophy of Martial Arts. Revista de Artes Marciales Asiáticas, [S. l.], v. 1, n. 3, p. 87–88, 2012. DOI: 10.18002/rama.v1i3.261. Disponível em: https://revistas.unileon.es/ojs/index.php/artesmarciales/article/view/261. Acesso em: 7 oct. 2022.