Priuralʹe v ėpokhu bronzy i rannego zheleza - Ivanov, V. A. (Vladimir Aleksandrovich); Pshenichn︠i︡uk, A. Kh (Akademi︠i︡a nauk SSSR, Bashkirskiĭ filial, In-t istorii, ︠i︡azyka i lit-ry, 1982)