Birukova, E. V., V. V. Varganov, and N. N. Konchinko. “Control of the Work Quality of Chemical and Analytical Departments of the Refractory Industry Enterprises of Ukraine in 2019”. Scientific Research on Refractories and Technical Ceramics, Vol. 120, Dec. 2020, pp. 219-25, doi:10.35857/2663-3566.120.21.