Zarauz Sancho A, Ruiz-Juan F. Motivaciones de los maratonianos según variables socio-demográficas y de entrenamiento (Motivations of Marathoners by socio demographic and training variables). Retos [Internet]. 2013 Jul. 1 [cited 2025 Sep. 22];24:50-6. Available from: http://207.180.252.49/index.php/retos/article/view/34524