Colacicchi R, Bizzarri R. Correlation between environmental evolution, historical settlement and cultural heritage upgrading in Valle Umbra (Central Italy). Geog. Fis. Dinam. Quat. 2008;31(2):107-118. Accessed April 4, 2025. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/292