Rai, H., Rai, B., & Thakur, R. (2010). Studies on Spectral Properties of Co(II), Ni(II) and Cu(II) Complexes with Ninhydrine and Ninhydrine Oximes. Asian Journal of Chemistry, 13(1), 277–282. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/22564