Authors Year Title
Becker, House & Bockwinkel 2002 Famennian ammonoid zones of the eastern Anti-Atlas (southern Morocco). [R.T.Becker, M.R.House, J.Bockwinkel, V.Ebbighausen & Z.S.Aboussalam].
Münsteraner Forschungen, Geologie und Paläontologie, 93: 159-205, 10 fig., 6 pl., Münster.