Stratigrafi︠i︡a i mikrofauna pozdnego karbona ranneĭ permi ︠I︡Uzhnogo Urala - Isakova, T. N. (Tatʹ︠i︡ana Nikolaevna) (Trudy (Geologicheskiĭ institut (Akademi︠i︡a nauk SSSR)), 1986)