Goutam, M.P., Ashok Yadav, and S.N. Limaye. “Electronic Spectral Studies on Mixed Ligand Complexes of Some Biologically Active Elements Pr(III) and Nd(III) Involving Histidine As Primary Ligand and Ninhydrin As Secondary Ligand ”. Asian Journal of Chemistry 10, no. 3 (March 30, 2010): 415–420. Accessed October 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/23649.