Slovarʹ russkogo i︠a︡zyka /
Ozhegov, Sergeĭ Ivanovich.
Shvedova, Natalʹi︠a︡ I︠U︡lʹevna.
Moskva : Sovetskai︠a︡ ėntsiklopedii︠a︡,
1973.
Russian language