Khursevich, G.K. & Lupikina, E.G. (1992). New freshwater species of the genus Actinocyclus Ehr. (Bacillariophyta) from the Upper Miocene deposits of Kamchatka. Algologia, 2(1): 71-73
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Khursevich, G.K. & Lupikina, E.G.
1992
New freshwater species of the genus Actinocyclus Ehr. (Bacillariophyta) from the Upper Miocene deposits of Kamchatka