Simvol u V︠i︡ach. Ivanova : tradi︠t︡si︠i︡a i spe︠t︡sifika - Sto︠i︡anovskiĭ, Mikhail ︠I︡Urʹevich ([Mosk. ped. gos. un-t im. V.I. Lenina], 1996)