Authors Year Title
Ebbighausen, Bockwinkel & Becker 2004 Late Emsian and Eifelian stratigraphy at Oufrane (Tata region, eastern Dra Valley, Morocco. [Ebbighausen,V., Bockwinkel,J., Becker, R.T., Aboussalam,Z.S., Bultynck,P., El Hassani,A. & Nübel,H.
Devonian Neritic-Pelagic correlation and events in the Dra Valley (Western Anti-Atlas, Morocco,  A. El Hassani, ed., Docum.Inst.Scient., 19: 44-52, 2 pl.,3 fig., Rabat.
Klug, Korn & Reisdorf 2000 Ammonoid and conodont stratigraphy of the late Emsian to early Eifelian (Devonian) at the Jebel Ouaoufilal (near Taouz, Tafilalt, Morocco).
Travaux de l'Institut Scientifique, Rabat. Série Géologie & Géographie Physique, 20: 45-56, 4 text-figs., 2 pls., Rabat.