Darbinyan, H. H., & Khachatryan, H. H. (2021). QUANTITATIVE DETERMINATION OF SELENIUM IN ASTRAGALUS AND THYME OFFICINAL PLANTS. Proceedings of the YSU B: Chemical and Biological Sciences, 55(2 (255), 196–198. https://doi.org/10.46991/PYSU:B/2021.55.2.196