Rubina, N.V. & Khursevich, G.K. (1990). [New representatives of the genus Actinocyclus (Bacillariophyta) from the late Oligocene of the western Siberia]. Botanicheskii Zhurnal, 75(11): 1565-1567, 2 pls.
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Rubina, N.V. & Khursevich, G.K.
1990
[New representatives of the genus Actinocyclus (Bacillariophyta) from the late Oligocene of the western Siberia]