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De Vijver, B. V.; Wetzel, C.; Kopalova, K.; Zidarova, R.; Ector, L. (2013). Analysis of the type material of Achnanthidium lanceolatum Brebisson ex Kutzing (Bacillariophyta) with the description of two new Planothidium species from the Antarctic Region. Fottea. 13(2): 105–117.