Etimologicheskiĭ slovarʹ russkogo i︠a︡zyka /
Moscow State University (Moscow). - Faculty of Philology.
Shanskiĭ, N. M.(Nikolaĭ Maksimovich)
Akhmanova, O. S.
Vinogradov, V. V.(Viktor Vladimirovich),1895-1969.
Moskva,
1963-1965.