Geological-structural-geochemical features of oil shale and hydrocarbon deposits formation of Boltysh impact structure - I. D. Bahrii; V. I. Pochtarenko; V. R. Dubosarskyi; O. O. Yantsevych; V. H. Semeniuk; M. V. Hryha; O. M. Malyshev; I. P. Hafich (Geological Journal, 2016)