S. Jha, Chandra. “Potentiometric Studies on Chelation of Cu(II), Ni(II), Co(II) and Fe(II) With O-Vanillinsemicarbazone ”. Asian Journal of Chemistry 8, no. 1 (March 30, 2010): 38–41. Accessed August 26, 2024. https://asianpubs.org/index.php/ajchem/article/view/24015.