Template:Furnish & Glenister, 1969
- Furnish, W.M. & Glenister, B.F. 1969. Mature Modification and Dimorphism in late Paleozoic Ammonoids. pp. 101–110. In: Westermann,G.E.G: Sexual Dimorphism in Fossil Metazoa and Taxonomic Implications, Intern. Union Geol. Sci., A(1). Stuttgart.