Corbi, Ileana, et al. “Mid-Term Geomorphological Evolution of the Covatta Valley, Biferno River Basin, Molise, Italy”. Geografia Fisica E Dinamica Quaternaria, vol. 22, no. 2, Dec. 1999, pp. 115-28, https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/468.