1. Salakhidinova , G.T., Kulkov , M.G., Kudrin , K.Y., Butyrin , R.I., Aliev , A.E., Motoshin , E.M.: Geological and geochemical characteristics of solid bitumen inclusions in volcanites of the pre-Jurassic complex of the Litvakovsky oil field. Journal of Mining Institute. 278, 77-90 (2026)