PATEL, K.P., and D.S. PABREJA. 2010. “PH Metric Studies on Some Binary Complexes of Dysprosium(III) and Ytterbium(III) With Ligands Containing N,N-Donor Atoms”. Asian Journal of Chemistry 20 (1):817-19. https://asianpubs.org/index.php/ajchem/article/view/19502.