Ivanyuk, E.V., and V.I. Suprunchuk. 2023. “ABOUT THE POSSIBILITY OF USING THE RED SLADGE IN THE SYNTHESIS OF INORGANIC PIGMENTS COFFE-BROWN COLOUR”. Sworld-Us Conference Proceedings 1 (usc18-01):41-44. https://doi.org/10.30888/2709-2267.2023-18-01-003.