Perez Garcia, Manuel, Sara Hermoso Gutierrez, Jonathan Ruiz Ruiz, and Palma Chillón Garzón. “Fiabilidad De Un Cuestionario De Barreras Del Desplazamiento Activo Al Colegio (Reliability of a Questionnaire on Barriers to Active Transportation to School)”. Retos 32 (July 1, 2017): 72–75. Accessed September 21, 2025. http://207.180.252.49/index.php/retos/article/view/48619.