Authors Year Title
Andrianov 1966 Verkhnepaleozoiskie otlozhenia zapadnogo Verkhoiania (Tompo-etchiskoe mezhdurechie).
1-131, 28 text-figs., 3 pls., Moskva (Nauka).
Miller, Furnish & Clark 1957 Permian ammonoids from Western United States.
Journal of Paleontology, 31 (6): 1057-1068, fig.1-6, pl.133-134; Tulsa,Oklahoma.
Nassichuk, Furnish & Glenister 1965 The Permian ammonoids from Arctic Canada.
Bulletin of the Geological Survey of Canada, 131: 1-56, fig.1-17, tab.1-7, pl.1-5; Ottawa.
Nassichuk 1970 Permian ammonoids from Devon and Melville Islands, Canadian Arctic Archipelago.
Journal of Paleontology, 44 (1): 77-97, fig.1-13, tab.1-3, pl.19-22; Tulsa,Oklahoma.