Polevoy G. 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 [Internet]. 25 de julio de 2024 [citado 3 de agosto de 2025];58:1006-13. Disponible en: http://revistaretos.org/index.php/retos/article/view/104290