Institut geologii (Akademi︠i︡a nauk SSSR. Komi nauchnyĭ ︠t︡sentr), Vseso︠i︡uznoe mineralogicheskoe obshchestvo, ︠I︡Udovich, ︠. Ė., & Silaev, V. I. (1987). Geokhimi︠i︡a, mineralogi︠i︡a i litologi︠i︡a chernykh slan︠t︡sev: Sbornik nauchnykh trudov. Komi filial AN SSSR.
Chicago-referens (17:e uppl.)Institut geologii (Akademi︠i︡a nauk SSSR. Komi nauchnyĭ ︠t︡sentr), Vseso︠i︡uznoe mineralogicheskoe obshchestvo, ︠I︡Akov Ėlʹevich ︠I︡Udovich, och V. I. Silaev. Geokhimi︠i︡a, Mineralogi︠i︡a I Litologi︠i︡a Chernykh Slan︠t︡sev: Sbornik Nauchnykh Trudov. Syktyvkar: Komi filial AN SSSR, 1987.
MLA-referens (8:e uppl.)Institut geologii (Akademi︠i︡a nauk SSSR. Komi nauchnyĭ ︠t︡sentr), et al. Geokhimi︠i︡a, Mineralogi︠i︡a I Litologi︠i︡a Chernykh Slan︠t︡sev: Sbornik Nauchnykh Trudov. Komi filial AN SSSR, 1987.