Debecca Devi, H., Th. David Singh, N. Yaiphaba, Ch. Sumitra, M. Indira Devi, and N. Rajmuhon Singh. 2010. “An Absorption Spectral Study of 4f-4f Transitions for the Interaction of Pr(III) With Different Amino Acids in Aqueous and Aquated Organic Solvents”. Asian Journal of Chemistry 16 (1):412-28. https://asianpubs.org/index.php/ajchem/article/view/19635.