Polevoy, Georgiy. «ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHORUsando Una técnica Experimental Para Desarrollar La Flexibilidad De Los niños (Using an Experimental Technique to Develop children’s flexibility): ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR». Retos 58 (julio 25, 2024): 1006–1013. Accedido abril 8, 2025. https://recyt.fecyt.es/index.php/retos/article/view/104290.