Pérez Gutiérrez, Mikel, and Carlos Gutiérrez García. “Bibliometric Analysis of Martial Arts Monographs Published in Spain (1906-2006)”. Revista de Artes Marciales Asiáticas 3, no. 4 (July 19, 2012): 22–33. Accessed June 4, 2023. https://revpubli.unileon.es/index.php/artesmarciales/article/view/387.