Poyarkov, B. V.; Skvortsov, V. P. (1971). Novyye rannevizeyskiye foraminifery Tyan'-Shanya (New early Visean foraminifers of Tien Shan). Paleontologicheskii Zhurnal - Paleontological Journal. 4: 125-128.
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Poyarkov, B. V.; Skvortsov, V. P.
1971
Novyye rannevizeyskiye foraminifery Tyan'-Shanya (New early Visean foraminifers of Tien Shan).