00634naa#a2200169#i#450# EN\\bibl\75363 20241202221511.1 2712-7761 20240221b2024####ek#y0engy0150####ca RU Russian scientific conference “Geochemistry and petrography of coal, oil shales and bituminous rocks” (October 2—5, 2023) Journal article Syktyvkar FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences" 2024 1 с. Journal article local Bushnev Dmitry Alekseevich Valyaeva O. V. komisc.editorum.ru