For citations:
Stukalova I.E., Sadchikova Т.А., Naugolnykh S.V., Chepalyga А.L. Gagates in Crimean middle jurassic sediments (Sudak): coal petrography, paleobotany, formation conditions. Proceedings of higher educational establishments. Geology and Exploration. 2023;(4):46-65. (In Russ.) https://doi.org/10.32454/0016-7762-2023-65-4-46-65