Sousa, Honorato José, Élvio Rúbio Gouveia, Adilson Marques, Hugo Sarmento, Romualdo Caldeira, Rúben Freitas, Helder Lopes, João Prudente, and Andreas Ihle. “El Efecto De Los Partidos Reducidos De Fútbol Equilibrados Y Desequilibrados Em La calificación Del Esfuerzo Percebido Em Los Jugadores Juveniles (The Effect of Balanced and Unbalanced Soccer Small-Sided Games on the Rating of Perceived Exertion in Youth”. Retos 41 (July 1, 2021): 440–446. Accessed June 13, 2026. https://revistaretos.org/index.php/retos/article/view/83091.