Cabrera A., Tafur L., y Garcia-Corzo S. «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». Expomotricidad, octubre de 2018, https://revistas.udea.edu.co/index.php/expomotricidad/article/view/336154.