Manton, I.; Sutherland, J.; Oates, K. (1977). Arctic coccolithophorids: Wigwamma arctica gen. et sp. nov. from Greenland and Arctic Canada, W. annulifera sp. nov. from South Africa and South Alaska and Calciarcus alaskensis gen. et sp. nov. from S. Alaska.
Proceedings of the Royal Society of London. Series B, Biological Sciences. 197: 145-168.