PICCINI, Leonardo. The glacier caves of Gornergletscher (Switzerland): preliminary notes on their morphology and hydrology. Geografia Fisica e Dinamica Quaternaria, [S. l.], v. 5, p. 151–156, 2001. Disponível em: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/1240.. Acesso em: 3 apr. 2026.