Wiedmann, Jost; Butt, Arif; Einsele, Gerhard (1982): Cretaceous stratigraphy, environment, and subsidence history at the Moroccan continental margin. Springer-Verlag, Berlin, Federal Republic of Germany, In: von Rad, Ulrich (editor), Hinz, Karl (editor), Sarnthein, Michael (editor), Seibold, Eugen (editor), Geology of the Northwest African continental margin Geologie de la marge continentale du Nord-Ouest de l'Afrique, 366-395, georefid:1985-015003