. . "Ukraine" . . . . . . . . "History" . . . . "Gorodishche Novotroit︠s︡koe : o kulʹture vostochnyx slavi︠a︡n v period slozhenii︠a︡ Kievskogo gosudarstva" . . . . . "Soviet Union" . . "862 - 1237" . .