Debecca Devi, H., and N. Rajmuhon Singh. 2011. “Absorption Spectral Study of 4f-4f Transitions for the Interaction of Nd(III) With Different Amino Acids in Presence and Absence of Ca(II) Zn(II)”. Asian Journal of Chemistry 23 (8):3587-94. https://asianpubs.org/index.php/ajchem/article/view/10697.