A.C.A. van Zutphen, W.A. van WameI, and A.J. Bons. “The Structure of the Lavagna Nappe in the Region of Monte Ramaceto and Val Graveglia (Ligurian Apennines, Italy)”. Netherlands Journal of Geosciences, Jan. 1985, pp. 373-84, https://njgjournal.nl/index.php/njg/article/view/13203.