Viswanathan, M., and G. Krishnan. “Synthesis and Characterization of Mixed Ligand Complexes of Thorium(IV) With Piperidinobenzylurea and Various Anions”. Asian Journal of Chemistry 16, no. 2 (September 2, 2016): 1039–1043. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/14576.