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3. B. I. Chuvashov, V. A. Luchinina, V. P. Shuiskii, et al., Fossil Calcareous Algae (Morphology, Systematics, and Methods of Investigation) (Nauka, Novosibirsk, 1987) [in Russian].
4. N. A. Drozdova, Algae in the Organogenic Structures of the Lower Cambrian of Western Mongolia (Nauka, Moscow, 1980) [in Russian].
5. S. B. Gushchin, “On the Emergence of the ‘Generic’ and ’specific’ Characters of the Problematic Genera Izhella and Shuguria,” in Calcareous Algae and Stromatolites (Nauka, Novosibirsk, 1988), pp. 22–25 [in Russian].