Authors Year Title
Armstrong, Dear & Runnegar 1967 Permian Ammonoids from Eastern Australia.
Journal of the geological Society of Australia, 14 (1): 87-97, 2 text-figs., pls.5-6.edit
Leonova & Shilovskii 2007 Evolution of the Permian Family Spirolegoceratidae (Goniatitida, Ammonoidea).
Paleontologicheskii Zhurnal, 41 (1): 28-38, 3 fig.,pl.5.