Varyukhina,L.M. (1980)
On the palynological characteristics of Ufimian deposits of the Pechorsk Synclise. (In: The Phanerozoic of the Northern European Part of the USSR.) [ K palinologicheskoi kharakteristike Ufimskikh otlozhenii Pechorskoi Sineklizy(In-Fanerozoi Seve Severa Evropeiskoi Chasti Sssr) ] Trudy Komi Filial,Institut Geologii,Izdatelstvo,Akademiya Nauk SSR,Nauka
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