“REACTION ORDER DETERMINATION IN THIOCYANATE SPECTROPHOTOMETRIC MEASUREMENT THROUGH EXTRACTION BY FORMATION OF ION PAIR WITH THIONINE”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 51, no. 2 (243), June 2017, pp. 96-99, https://doi.org/10.46991/PYSUB.2017.51.2.096.