Authors Year Title
Barskov, Simakov & Alekseev 1984 Devonian-Carboniferous transitional deposits of the Berchogur section, Mugozhary, USSR (Preliminary report).
Courier Forschungsinstitut Senckenberg, 67: 207-230, fig.1-7, pl.1-8; Frankfurt a.M.
Bogoslovsky 1987 Ammonoidei.-In: V.A.Maslov [ed.]: Fauna i biostratigrafiya pogranichnykh otlozheniy Devona i Karbona Berchogura (Mugodzhary).
52-58, pl.5,6; Moskva: Nauka
House 1993 Earliest Carboniferous goniatite recovery after the Hangenberg Event.
Annales de la Societé géologique de Belgique, 115 (2): 559-579, fig.1-2, pl.1-5; Bruxelles.
Kuzina 1985 K revizii roda Imitoceras (Ammonoidea).
Paleontologicheskiy Zhurnal, 1985 (3): 35-48, fig.1-4, pl.3; Moskva.