Tater, P.C., Ms. Aryamitra Pandey, and K.P. Soni. 2010. “Variation in Symmetry Around Doped Nd3+ Ion in Saturated Solution of Sulphonalides With Reference to Judd-Ofelt Electronic Spectral Parameter”. Asian Journal of Chemistry 13 (2):801-2. https://asianpubs.org/index.php/ajchem/article/view/22678.