	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.
	Diener	1927	Leitfossilien des marinen Perm. G.Gürich: Leitfossilien, 5: 1-84, fig.1-10, pl.1-14; Berlin (Borntraeger).
	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.
	Glenister & Furnish	1988	Terminal Progenesis in Late Paleozoic Ammonoid Families. In: Wiedmann, J. & Kullmann, J. (Eds.), Cephalopods - Present and Past: 51-66, fig.1-3; Stuttgart.
	Glenister & Furnish	1988	Patterns in stratigraphic distribution of Popanocerataceae, Permian ammonoids. Senckenbergiana lethaea, 69: 43-71, 10 text-figs., 4 pls., 2 tabl., Frankfurt.
	Greco	1935	La Fauna Permiana del Sosio conservata nei Musei di Pisa, di Firenze e di Padova. Palaeont. Italica, 35 (n.S. 5): 101-190, pl.12-15; Siena.
	Leonova & Dmitriev	1989	Rannepermskie ammonoidei Yugo-Vostochnogo Pamira. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 235: 1-198, fig.1-79, pl.1-16; Moskva.
	Miller & Warren	1933	A Propinacoceras from North America. American Journal of Science, 153: 295-299, fig.1-4; New Haven.
	Miller	1936b	A species of the ammonoid genus Artinskia from the Lower Permian of Kansas. Journal of Paleontology, 10 (6): 490-496, fig.1-6, pl.73; Tulsa, Oklahoma.
	Miller & Furnish	1940c	Permian ammonoids of the Guadalupe Mountain Region and adjacent areas. Special Papers of the Geological Society of America, 26: 1-242, fig.1-59, pl.1-44; Baltimore.
	Nassichuk	1977	Upper Permian ammonoids from the Cache Creek Group in Western Canada. Journal of Paleontology, 51 (3): 557-590, fig.1-20, tab.1-7, pl.1-3; Tulsa, Okla.
	Pillevuit	1993	Les Bloc Exotiques du Sultanat d'Oman. Evolution paléogéographique d'une marge passive flexurale. Mémoires de Géologie (Lausanne), 17: 1-249, 131 figs., 7 tabs., 7 pls., Lausanne.
	Plummer & Scott	1937	Upper Paleozoic ammonites in Texas. The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.
	Ruzhencev	1949	Sistematika i evolyutsia semeystv Pronoritidae Frech i Medlicottiidae Karpinsky. Trudy Palentologicheskogo Instituta Akademiya Nauk SSSR, 19: 1-206, fig.1-88, pl.1-17; Moskva.
	Termier, Termier & Desparmet	1972	Les Ammonoides du Permien (Kubergandien) de Tezak (Afghanistan central). [Termier,H., Termier,G., Desparmet,R. & Montenat,C.] Société géologique du Nord, Annales, 92: 105-115, 7 figs., pl.13-17, Lille.
	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.