Round, F.E. & Håkansson, H. (1992). Cyclotelloid species from a diatomite in the Harz mountains, Germany, including Pliocaenicus gen. nov. Diatom Research, 7(1): 109-125
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Round, F.E. & Håkansson, H.
1992
Cyclotelloid species from a diatomite in the Harz mountains, Germany, including Pliocaenicus gen. nov.