Bobrova,S.I. et al. (1989)
Cenozoic palynocomplexes in the Surgut-Ob Regions. (In: The Cenozoic of Siberia and Northeastern USSR. V.S.Zykina.editor) [ Palinokompleksy Kainozoya Surgutskogo Priobya. (In: Kainozoi Sibiri i Severo-Vostoka SSSR. V.S.Zykina,editor) ] Sibirskoe Otdelenie, Trudy Institut Geologii i Geofiziki, Akademiya Nauk SSSR. (Novosibirsk)
Vol. 668 P. 71- 75