Schafersman, Steven D. (1982): Evolutionary modes of Miocene Artiscinae (Radiolaria); gradual phyletic change and punctuated speciation. Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States, In: Anonymous, North American paleontological convention III; abstracts of papers, 56, Suppl. to No. 2., 23, georefid:1983-007263