Pozdnepermskiĭ ėtap ėvol︠i︡u︠t︡sii organicheskogo mira : dzhulʹfinskiĭ i dorashamskiĭ ︠i︡arusy SSSR : Proekt No. 106 ("Permo-triasova︠i︡a stadi︠i︡a geologicheskoĭ ėvol︠i︡u︠t︡sii") Mezhdunarodnoĭ programmy geologicheskoĭ korrel︠i︡a︠t︡sii - Kotl︠i︡ar, G. V.; Gramm, M. N.; Rostov︠t︡sev, K. O. (Kirill Olegovich) ("Nauka," Leningradskoe otd-nie, 1983)