M. Guglielmin and C. Tellini, “Rilevamento del permafrost con il metodo BTS (Bottom temperature of the Winter Snow Cover) nell’Alta Valtellina (Sondrio, Italia): Permafrost mapping with BTS methodology in the Upper Valtellina (Sondrio Province, Italy)”, Geog. Fis. Dinam. Quat., vol. 17, no. 1, pp. 47–54, Jun. 1994, Accessed: Jun. 25, 2026. [Online]. Available: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/680