Krestʹ︠i︡anstvo Severa Rossii v XVI v. : mezhvuzovskiĭ sbornik nauchnykh trudov - Vasilʹev, ︠I︡U. S. (︠I︡Uriĭ Sergeevich) (Vologodskiĭ gos. pedagog. in-t, 1984)