Pineda-Espejel, Heriberto Antonio, et al. “Respuesta De Cortisol Salival Y Ansiedad Precompetitiva En Nadadores (Salivary Cortisol Response and Precompetitive Anxiety in Swimmers)”. Retos, vol. 38, July 2020, pp. 1-7, https://doi.org/10.47197/retos.v38i38.72229.