Reference
Rudolph Sophus Ludvig 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.