Rudolph S. Bergh (1882): Scient. Results of the Exploration of Alaska Vol. I. art. VI. On the Nudibranchiata Grasteropod Mollusca of the North Pacific Ocean, with special reference to those ofAlaska, II. Part. – Malakozoologische Blätter – NF_5_1882: 67 - 68.
S.A. Miller (1882): The American Palaeozoic Fossils, a Catalogue of the Genera and species with names of authors, dates, places ofpublication, groups of Rocks in which found etc. Cincinnati 1877. – Malakozoologische Blätter – NF_5_1882: 76 - 77.