Hakobyan, G. V., Karamyan, R. A., Grigoryan, S. K., & Yeritsyan, M. L. (2005). INTERACTIONS OF METHYLOL DERIVATIVES OF UREA WITH Co(II) AND Ni(II) SALTS. Proceedings of the YSU B: Chemical and Biological Sciences, 39(2 (207), 66–70. https://doi.org/10.46991/PYSU:B/2005.39.2.066