Citation: Holloway D.j, The trilobite Protostygina and the composition of the Styginidae, with two new genera Bucerotes, Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 81(1), 2007, pp. 1-16
Citation: Holloway D.j, The trilobite genera Eocryphops and Plagiolaria (Phacopidea), Palaontologische Zeitschrift Palaontologische Zeitschrift (Print);Journal of Palaontologische Gesellschaft Scientific contributions to palaeontology, 79(2), 2005, pp. 227-239