Citation: A. Hoffman et Reif W.e, Rudolf Kaufmann's work on iterative evolution in the Upper Cambrian trilobite genus Olenus: A reappraisal, Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 68(1/2), 1994, pp. 71-87