International Geological Correlation Programme. Project No. 203--"Permo-Triassic Events of the Tethys Region and Their Intercontinental Correlation.", International Geological Correlation Programme. Project No. 272 "Late Palaeozoic and Early Mesozoic Circum-Pacific Events.", Dalʹnevostochnyĭ geologicheskiĭ institut (Akademi︠i︡a nauk SSSR), Vseso︠i︡uznyĭ nauchno-issledovatelʹskiĭ geologicheskiĭ institut imeni A.P. Karpinskogo, Kotl︠i︡ar, G. V., & Zakharov, ︠. D. (1989). Pozdnepermskiĭ ėtap ėvol︠i︡u︠t︡sii organicheskogo mira: Midiĭskiĭ ︠i︡arus SSSR. "Nauka," Leningradskoe otd-nie.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Geological Correlation Programme. Project No. 203--"Permo-Triassic Events of the Tethys Region and Their Intercontinental Correlation.", International Geological Correlation Programme. Project No. 272 "Late Palaeozoic and Early Mesozoic Circum-Pacific Events.", Dalʹnevostochnyĭ geologicheskiĭ institut (Akademi︠i︡a nauk SSSR), Vseso︠i︡uznyĭ nauchno-issledovatelʹskiĭ geologicheskiĭ institut imeni A.P. Karpinskogo, G. V. Kotl︠i︡ar, و ︠I︡U. D. Zakharov. Pozdnepermskiĭ ėtap ėvol︠i︡u︠t︡sii Organicheskogo Mira: Midiĭskiĭ ︠i︡arus SSSR. Leningrad: "Nauka," Leningradskoe otd-nie, 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Geological Correlation Programme. Project No. 203--"Permo-Triassic Events of the Tethys Region and Their Intercontinental Correlation.", et al. Pozdnepermskiĭ ėtap ėvol︠i︡u︠t︡sii Organicheskogo Mira: Midiĭskiĭ ︠i︡arus SSSR. "Nauka," Leningradskoe otd-nie, 1989.