Popp, A., Pärnaste, H. 2008.
Morphometric study of the Ordovician proetid trilobite Cyamella stensioei Owens, 1978.Advances in trilobite research, pp. 327-332.
Owens, R. M. 1978.
The trilobite genera Panarchaeogonus Öpik, Isbergia Warburg and Cyamops gen. nov. from the Ordovician of Balto-Scandia and British Isles.Norsk Geologisk Tidsskrift58,
199-219.