“EFFECT OF VITAMINS NICOTINIC ACID, PYRIDOXINE AND Co2+, Mn2+, Cu2+ METAL-IONS ON CRITICAL MICELLE CONCENTRATION OF ANIONIC, CATIONIC AND NONIONIC SURFACTANTS IN AQUEOUS SOLUTIONS” (2015) Proceedings of the YSU B: Chemical and Biological Sciences, 49(2 (237), pp. 3–8. doi:10.46991/PYSUB.2015.49.2.003.