Authors Year Title
Foord & Crick 1897 Catalogue of the fossil Cephalopoda in the British Museum (Natural History). Part III, containing the Bactritidae and part  of the Suborder Ammonoidea).
pp.I-XXXIII, 1-303, 145 figs., London.
Foord 1903 Monograph of the Carboniferous Cephalopoda of Ireland, Part V, Containing the families Glyphioceratidae (concluded) and          Prolecanitidae, with title-page and index.
Palaeontolographical Society, 57: 147-234, pl.40-49; London.
Kennedy 1977 Ammonite evolution.
In Hallam,A. (Ed.): Patterns of evolution, as illustrated by the fossil record. 251-304, fig.1-33: Amsterdam, Oxford, New York (Elsevier).
Sowerby 1814 Mineral Conchology of Great Britain, volume I.
1-234, pl.1-102; London.