Thakur, B.G., and Ragini Kumari. 2010. “Studies of Luminescence Spectral Properties of Praseodymium(III) and Samarium(III) Complexes With N,N?,N?-Tri-(2,4-Dihydroxylbenzophenone)-Triaminotriethylamine”. Asian Journal of Chemistry 20 (6):4949-51. https://asianpubs.org/index.php/ajchem/article/view/19127.