1. Ball, I. R. 1975. Nature and formulation of biogeographical hypotheses. Systematic Zoology 24: 407–430.
2. Ball, I. R. 1979. Problemen in de historische biogeografie. Vakblad voor Biologen 21: 384–388.
3. Ball, I. R. 1980. The status of historical biogeography. Actis XVII Congressus Internationalis Ornithologici, Deutsche Ornithologen-Gesellschaft, Berlin: 1283–1288.
4. Ball, I. R. 1982. Implication, conditionality and taxonomic statements. Bijdragen tot de Dierkunde 52: 186–190.
5. Ball, I. R. 1983. Planarians, plurality and biogeographical explanations. Pp. 409–430. In: Sims, R. W., Price, J. H., and Whalley, P. E. S. (Eds) Evolution, Time and Space: The Emergence of the Biosphere, Systematics Association Special Volume No. 23. Academic Press, London and New York.