Cabrera, Arturo, Luis Tafur, y Garcia-Corzo Sergio. «YO-YO INTERMITTENT RECOVERY TEST LEVEL 2. CARDIORESPIRATORY RESPONSE AND PERFORMANCE IN COLOMBIAN PROFESSIONAL SOCCER PLAYERS. COMPARISON BETWEEN SUB 20 AND OVER 20 YEARS OLD PLAYERS». Expomotricidad00 (octubre 30, 2018). Accedido julio 31, 2021. https://revistas.udea.edu.co/index.php/expomotricidad/article/view/336154.