PINGALKAR, S.R., and M.N. DESHPANDE. “Synthesis and Characterization of Lanthanide(III) 7-[(Amino(4-Hydroxyphenyl) Acetyl) Amino]-3-Methyl-8-Oxo Complexes ”. Asian Journal of Chemistry, vol. 15, no. 1, Mar. 2010, pp. 105-10, https://asianpubs.org/index.php/ajchem/article/view/21512.