Brandolini, Pierluigi, Francesco Faccini, Luigina Renzi, and Andrea Robbiano. “Geodiversity In Graveglia Valley (Ligurian Appennines). Proposals For Tourist Promotion And For The Creation Of A Geopark”. Bollettino della Società Geografica Italiana (December 31, 2008): 913–927. Accessed October 11, 2026. https://bsgi.it/index.php/bsgi/article/view/7208.