THE STUDY OF THE COMPLEX FORMATION OF THE COPPER(II) ION WITH SALICYLIC ACID BY MEANS OF THE EPR AND UV-VIS SPECTROSCOPY METHODS WITHIN WIDE RANGE OF AQUEOUS MEDIUM’S pH VALUES. (2019). Proceedings of the YSU B: Chemical and Biological Sciences, 53(3 (250), 166-170. https://doi.org/10.46991/PYSUB.2019.53.3.166