About the Age of Fossil Flora of the Kygyltasian Regional Stage of the Upper Paleozoic in the Verkhoyansk Region, Northeastern Russia
Učënye zapiski Kazanskogo universiteta. Seriâ  Estestvennye nauki/Učënye zapiski Kazanskogo universiteta. Seriâ Estestvennye nauki/Učenye zapiski Kazanskogo gosudarstvennogo universiteta. Seriâ Estestvennye nauki