“Spectrophotometric Determination of Hydrazine Sulphate Using Fe(II)-2,2’-Bipyridyl-Application to Various Water Samples”. The Eurasia Proceedings of Science, Technology, Engineering and Mathematics 7 (November 24, 2019): 23–32. Accessed January 21, 2026. https://www.epstem.net/index.php/epstem/article/view/225.