Sokolenko, N., Ruban, E., Ostrovka, V., Oleksiy, M., Popov, Y. and Sedych, A. 2019. Study of the toxicological characteristics of water-soluble surface-active substances obtained based on phenol, formaldehyde and sodium sulphite. Technology audit and production reserves. 1, 3(51) (Dec. 2019), 44–47. DOI:https://doi.org/10.15587/2312-8372.2020.193074.