John, Magi, and P.K. Radhakrishnan. 2010. “Synthesis and Physicochemical Studies of Iodide Complexes of Lanthanides and Yttrium With 4-Aminoantipyrine ”. Asian Journal of Chemistry 4 (3):666-69. https://asianpubs.org/index.php/ajchem/article/view/25114.