Khitrova,P.M. et al. (1971)
Palynological Grounds for stratigraphical subdivision of Neogene-Lower Quaternary deposits from the South Margin of the Yamo-Indigirka Lowland [ Palinologicheskoe Oboshnovanie stratigraficheskogo Raschleneniya Neogenovykh-Nizhnechetvertichnykh otlozhenii Yuzhnoi Okrainy Yano-Indigirskoi Nizmennosti ] Uchenye Zapiski(Science Notes), Paleontologiya i Biostratigrafiya (NIIGA) Ministerstvo Geologii SSR
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