Ufimtsev, Gennadi F. “The Concept of Earth Relief Genesis: Its Common and Hidden (or True) Meaning”. Geografia Fisica e Dinamica Quaternaria 20, no. 1 (June 30, 1997): 169–177. Accessed October 22, 2026. https://gfdq.glaciologia.it/index.php/GFDQ/article/view/576.