Authors Year Title
Bogoslovskaya, Leonova & Shkolin 1995 The Carboniferous-Permian boundary and ammonoids from the Aidaralesh section, southern Urals.
Journal of Paleontology 69: 288-301, 12 figs., Lawrence, KS.
Nassichuk 1975 Carboniferous ammonoids and stratigraphy in the Canadian Arctic Archipelago.
Bulletin of the Geological Survey of Canada, 237: 1-240, fig.1-57, tab.1-33, pl.1-18; Ottawa.
Nassichuk & Lin 1992 Ammonoids and Fusulinaceans near the Carboniferous-Permian boundary in the Canadian Arctic Archipelago
Permophiles, Subcomm.Permian Stratigraphy, 21:11-15, 1 tab.,
Nishida 1971 Carboniferous Ammonoids from Akiyoshi.
Bulletin of the Akiyoshi-dai Science Museum, 7: 1-24, 11 figs., 1 tabl., 7 pls., Shuho, Yamaguchi pref., Japan.
Wagner-Gentis 1985 A possible Atokan goniatite fauna from the basal Moscovian (Westphalian A) deposits at Piedrasluengas, N.W. Spain.
Senckenbergiana lethaea, 65 (4/6): 337-345, fig.1-2, pl.1; Frankfurt am Main.