POLEVOY, Georgiy. ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR Períodos sensibles de desarrollo de la flexibilidad en la edad escolar (Sensitive periods of flexibility development at school age): ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR. Retos, [S. l.], v. 56, p. 1066–1074, 2024. DOI: 10.47197/retos.v56.106243. Disponível em: http://www.revistaretos.org/index.php/retos/article/view/106243. Acesso em: 21 ago. 2025.