1. Bayer, U., and McGhee, G. R., Jr., 1985, Evolution in marginal epicontinental basins: The role of phylogenetic and ecological factors, in: Sedimentary and Evolutionary Cycles (U. Bayer and A. Seilacher, eds.), Lecture Notes in Earth Sciences Vol. 1, Springer-Verlag, Berlin, pp. 164–220.
2. Becker, R. T., 1993, Anoxia, eustatic changes, and Upper Devonian to lowermost Carboniferous global ammonoid diversity, in: The Ammonoidea: Environment, Ecology, and Evolutionary Change (M. R. House, ed.), The Systematics Association Special Volume No. 47. Clarendon Press, Oxford, pp. 115–163.
3. Callomon, J. H., 1985, The evolution of the Jurassic ammonite family Cardioceratidae, Special Papers in Palaeontology 33:49–90.
4. Cobban, W. A., 1987, Some Middle Cenomanian (Upper Cretaceous) acanthoceratid ammonites from the Western Interior of the United States, USGS Professional Paper 1445.
5. Cobban, W. A., and Kennedy, W. J., 1991, Evolution and biogeography of the Cenomanian (Upper Cretaceous) ammonite Metoicoceras Hyatt, 1903, with a revision of Metoicoceras praecox Haas, 1949, USGS Bulletin 1934.