Ėkostratigrafi︠i︡a i ėkologicheskie sistemy geologicheskogo proshlogo : trudy XXII sessii Vseso︠i︡uznogo paleontologicheskogo obshchestva - Sokolov, Boris Sergeevich, 1914-; Stepanov, D. L. (Dmitriĭ Leonidovich); Khoza︠t︡skiĭ, Lev Isaakovich (Nauka, 1980)