Authors Year Title
Blendinger, Furnish & Glenister 1992 Permian cephalopod limestones, Oman Mountains: evidence for a Permian seaway along the northern margin of Gondwana.
Palaeogeography, Palaeoclimatology, Palaeoecology, 93: 13-20, 4 figs., Amsterdam.
Davis 1972 Mature modifications and dimorphism in selected Late Paleozoic ammonoids.
Bulletins of American Paleontology, 62 (272): 27-130, pls.3-21, Ithaca, NY.
Frech 1897- Lethaea geognostica oder Beschreibung und Abbildung der für die Gebirgs-Formationen bezeichnendsten Versteinerungen. I. Theil. Lethaea palaeozoica. 2. Band.
35pls, 6maps, 551figs.; Stuttgart.
Gemmellaro 1887 La Fauna dei Calcari con Fusulina della valle del Fiume Sosio (nella Provincia di Palermo).
Giornale di scienze naturali ed economiche, 19: 1-106, pl.1-10; Palermo.
Vasicek & Kullmann 1988 Eine Ammonoideen-Fauna vom Sosio-Typ (Guadalupian, Ober-Perm) aus Kurdistan (Irak).
Palaeontographica, Abt.A, 204 (1-3): 95-115, fig.1-5, pl.1-2; Stuttgart.
Vasicek 1988 Upper Permian Ammonoidea from Kurdistan, NE Iraq.
In: Wiedmann,J. & Kullmann,J. (eds.), Cephalopods - Present and Past, 577-591, 3 pls., 16 figs., Stuttgart.