Mikhelis,A.A. et al. (1971)
The spore-pollen complexes of Low Paleogenic continental Carboniferous deposits of the south-western margin of the Donets Basin. [ Sporovo-pyl'tsevyye kompleksy Nizhnepaleogenovykh Kontinental'nykh Uglenosnykh otlozheniy Yugo Zapadnoy Okrainy Donbacca. ] International Palynological Conference,3rd.Problems of Palynology.Naukova Dumka,(Kiev)
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