Murakami, Katsumi. “Renkoho: Maintaining a Flexible Body for Health &Amp; Longevity”. Revista de Artes Marciales Asiáticas 4, no. 1 (July 16, 2012): 94–103. Accessed June 6, 2023. https://revistas.unileon.es/ojs/index.php/artesmarciales/article/view/229.