Sergeev, V. N.; Sharma, M.; Shukla, Y. (2008). Mesoproterozoic silicified microbiotas of Russia and India - characteristics and contrasts. The Palaeobotanist. 57: 323-358.
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Sergeev, V. N.; Sharma, M.; Shukla, Y.
2008
Mesoproterozoic silicified microbiotas of Russia and India - characteristics and contrasts