Paz-y-Miño, Guillermo, and Avelina Espinosa. “Progressive Aikido: The Essential Elements”. Revista de Artes Marciales Asiáticas 1, no. 3 (July 17, 2012): 91. Accessed November 23, 2024. https://revpubli.unileon.es/index.php/artesmarciales/article/view/264.