Lebedev,I.V. et al. (1962)
The development of the Upper Cretaceous flora of the Western Siberian Lowlands. [ Ocherk Razvitiya verkhnemelovoy flory Zapadnoy Sibiri. ] Akademiya Nauk SSR,Far East Science Centre.(Vladivostok),Biostratigraphic Problems of the Soviet Far East
Vol. 22 P. 229- 237