Dramis, Francesco, et al. “Mountain Permafrost and Slope Stability in the Periglacial Belt of the Alps: Meeting Ipa 1997 in Italy, Zürich-Bormio, August 22-27”. Geografia Fisica E Dinamica Quaternaria, vol. 3, no. 2, Jan. 1997, pp. 181-03, https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/1157.