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Ruslan Sobolevskyi, Valentyn Korobiichuk, Levytskyi, V., Victor Pidvysotskyi, Oleksandr Kamskykh and Liudmyla Kovalevych 2020. Optimization of the process of efficiency management of the primary kaolin excavation on the curved face of the conditioned area. Rudarsko-geološko-naftni zbornik. 35, 1 (Jan. 2020). DOI:https://doi.org/10.17794/rgn.2020.1.10.