Haug, Joachim T., and Carolin Haug. “Are there martial art styles that represent natural systems?”. Revista de Artes Marciales Asiáticas 10, no. 2 (December 28, 2015): 88–104. Accessed December 21, 2024. https://revpubli.unileon.es/index.php/artesmarciales/article/view/3296.