Osnovnye problemy izuchenii︠a︡ obrazovanii︠a︡ i razvitii︠a︡ drevnerusskogo literaturnogo i︠a︡zyka /
Vinogradov, V. V.(Viktor Vladimirovich),1895-1969.
Leipzig :  Zentralantiquariat, 
1974.
Reprint of the Moscow, 1958 edition.
Russian language