	Authors	Year	Title
	Bogoslovskaya	1990	Osnovye puti razvitiya i klassifikatsiya pozdnepaleozoyskikh ammonoidey Marathonitaceae i Cyclolobaceae. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 243: 70-86, fig.1-3; Moskva.
	Davis, Furnish & Glenister	1969	Mature Modification and Dimorphism in late Paleozoic Ammonoids. In: Westermann,G.E.G:Sexual Dimorphism in Fossil Metazoa and Taxonomic Implications,Intern.Union Geol.Sci., A (1):101-110, 2 figs., pl.2-5, Stuttgart.
	Davis	1972	Mature modifications and dimorphism in selected Late Paleozoic ammonoids. Bulletins of American Paleontology, 62 (272): 27-130, pls.3-21, Ithaca, NY.
	Davis, Landman & Dommergues	1996	Mature Modifications and Dimorphism in Ammonoid Cephalopods. [Davis,R.A., Landman, N.H., Dommergues, D.M., Marchand, D. & Bucher, H.] In: Ammonoid Paleobiology, N.H.Landman, K.Tanabe & R.A.Davis [eds.], 463-539, 15 figs, 1 tabl., New York (Plenum).
	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.
	Gemmellaro	1888	La Fauna dei Calcari con Fusulina della valle del Fiume Sosio (nella Provincia di Palermo). Appendice. Giornale di Scienze naturali ed economiche, 20, 9-36, pl.A-D; Palermo [1890].
	Glenister & Furnish	1987	New Permian representatives of ammonoid superfamilies Marathonitaceae and Cyclolobaceae. Journal of Paleontology, 61 (5): 982-998, fig.1-4, 1tab.; Lawrence, Kansas.
	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.