Jousé, A.P. (1978). [Diatoms and Silicoflagellates of Late Oligocene (from) South Mangyshlak]. In: Marine Micropaleontology (Diatoms, Radiolarians, Silicoflagellates, and Calcareous Nannofossils), Academy of Sciences USSR, Oceanographic Commission. Publishing House "Nauka", Moscow, pp. 49-56, pls 11-13