Río-Rama, María, Claudia Maldonado-Erazo, Amador Durán-Sánchez, and José Álvarez-García. “Mountain Tourism Research. A Review”. European Journal of Tourism Research 22 (July 1, 2019): 130–150. Accessed October 16, 2021. https://ejtr.vumk.eu/index.php/about/article/view/380.