Kossovoy,L.S. et al. (1963)
Upper Devonian spore-pollen complexes of the eastern Slope of North Timan and their biostratigraphic significace. [ Sporovo-pyl'tsevyye kompleksy verkhnego Devona Vostochnogo Sklona Severnogo Timana i Ikh biostratigraficheskoye Znaheniye. ] Doklady Akademii Nauk SSSR
Vol. 153 # 6 P. 1404- 1406