Galoyan, K.H. 2009. EXTRACTION-PHOTOMETRIC DETERMINATION OF NORSULFAZOLE USING TRIMETHYLTHIONIN BASIC DYE . Proceedings of the YSU B: Chemical and Biological Sciences. 43, 1 (218) (Feb. 2009), 61–64. DOI:https://doi.org/10.46991/PYSU:B/2009.43.1.061.