A .J. DE FEYTER; N. MOLENAAR; G. PIALLI; M. MENICHETTI; F. VENERI. Palaeotectonic significance of gravity displacement structures in the Miocene turbidite series of the M. Pollo Syncline (Umbro-Marchean Apennines, Italy). Netherlands Journal of Geosciences, p. 69-86, 1 Jan. 1990.