1. Yochelcionella (Mollusca, Helcionelloida) from the lower Cambrian of North America
2. Taxonomy and paleobiology of some Middle Cambrian Scenella (Cnidaria) and hyolithids (Mollusca) from western North America;Babcock L.E.;University of Kansas Paleontological Contributions, Paper,1988
3. Early Cambrian fossils from South Australia;Bengtson S.;Association of Australasian Palaeontologists Memoir,1990
4. Bengtson, S., Matthews, S.C. & Missarzhevsky, V.V., 1986. The Cambrian netlike fossil Microdictyon. In Problematic Fossil Taxa. hoffman, a. & nitecki, M., eds, Oxford Monographs on Geology and Geophysics 5, Oxford University Press, New York, 97–115.
5. Berkey, C.P., 1898. Geology of the St. Croix Dalles, III: Paleontology. The American Geologist. 21, 270–294.