Geokchyan, N. O., et al. “EXTRACTION-ABSORBTIOMETRIC DETERMINATION OF MICROGRAM AMOUNTS OF RHODIUM (III) OF THIAZINE ROW THIONINE YELLOW”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 42, no. 2 (216), Sept. 2023, pp. 80-84, doi:10.46991/PYSU:B/2008.42.2.080.