Ishkov, V. ., & Koziy, E. (2017). Distribution of toxic and potentially toxic elements in the coal of the layer c₇ᴴ of the "Pavlogradskaya" mine of Pavlogradsko-Petropavlovskiy geological and industrial district. Visnyk of Taras Shevchenko National University of Kyiv. Geology, 4(79), 59-66. https://doi.org/10.17721/1728-2713.79.09