Millán, Gonzalo Ariel. “The Honorable Brotherhood of Black Belts in Korean martial arts”. Revista de Artes Marciales Asiáticas 14, no. 1 (July 10, 2019): 21–36. Accessed April 19, 2024. https://revpubli.unileon.es/ojs/index.php/artesmarciales/article/view/5863.