ALIYEV, A. A.; ABBASOV, O. R.; AGAYEV, A. M. Mineralogy and geochemistry of oil shale in Azerbaijan: classification, palaeoweathering and maturity features. Visnyk of V. N. Karazin Kharkiv National University. Series Geology. Geography. Ecology, n. 50, p. 11-26, 10 Jul. 2019.