Za zemli︠u︡ Russkui︠u︡ pami︠a︡tniki literatury drevneĭ Rusi XI-XV vekov /
Begunov, I︠U︡riĭ Konstantinovich.
Moskva "Sov. Rossii︠a︡"
1981
Bibliography: p. 514-516
Russian literature