Process from pattern: tests for selection versus random change in punctuated bryozoan speciationColumbia University Press184–207
Cheetham, Alan H. and Jackson, Jeremy B. C. 1995. "Process from pattern: tests for selection versus random change in punctuated bryozoan speciation." In New Approaches to Speciation in the Fossil Record. Erwin, Douglas H. and Anstey, R. L., editors. 184–207. New York: Columbia University Press.