Roshchevskiĭ, M. P. (2006). Zagaĭnova Gertruda Vasilʹevna. Komi nauchnyĭ ︠t︡sentr Uralʹskogo otdeleni︠i︡a RAN.
Lua i Stíl Chicago (17ú heag.)Roshchevskiĭ, Mikhail Pavlovich. Zagaĭnova Gertruda Vasilʹevna. Syktyvkar: Komi nauchnyĭ ︠t︡sentr Uralʹskogo otdeleni︠i︡a RAN, 2006.
Lua MLA (8ú heag.)Roshchevskiĭ, Mikhail Pavlovich. Zagaĭnova Gertruda Vasilʹevna. Komi nauchnyĭ ︠t︡sentr Uralʹskogo otdeleni︠i︡a RAN, 2006.
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