Nagy, B., Ignéczi, Á., Kovácsné Székely, I., Ruiz-Pereira, S., Mihajlik, G., Felkai, P., Mari, L. (2023): The challenges of commercial mountaineering on the highest Volcanic Seven Summit, the Ojos del Salado - Hungarian Geographical Bulletin, 72(1), 23-40. https://doi.org/10.15201/hungeobull.72.1.2