Polevoy, Georgiy. «ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR Períodos Sensitivos Para El Desarrollo De La Resistencia De Los Escolares (Sensitive Periods for the Development of Endurance of schoolchildren): ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR». Retos 55 (junio 1, 2024): 672–678. Accedido abril 8, 2025. https://recyt.fecyt.es/index.php/retos/article/view/104093.