Guíu Carrera, Marta, and Marta Leyton Román. “Perfil psicológico En Corredores De ultramaratón (Psychological Profile in Ultramarathon Runners)”. Retos 36 (July 1, 2019): 310–317. Accessed December 16, 2025. http://207.180.252.49/index.php/retos/article/view/69119.