Authors Year Title
Kullmann & Scheuch 1972 Absolutes und relatives Wachstum bei Ammonoideen.
Lethaia, 5: 129-146, fig.1-6; Oslo.
Nikolaeva 1999 Ammonoidei iz Bogdanovskogo gorizonta (Srednii Karbon) Yuzhnogo Urala. [In Russian, with English summary: Ammonoids of the Bogdanovsky Horizon (Middle Carboniferous) of the South Urals].
Paleontologicheskii Zhurnal, 1999 (1): 12-19, 2 figs. 1 pl., Moskva.
Ruzhencev & Bogoslovskaya 1971a Namiurskii etap v evoliutsii ammonodei. Rannenamiurskie ammonoidei.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 133: 1-382, fig.1-89, pl.1-40; Moskva.
Yates 1962 The Palaeontology of the Namurian rocks of Slieve Anierin, Co. Leitrim, Eire.
Palaeontology, 5(3): 355-443, fig.1-4, pl.51-62, tab.1-4; London.