Dr. Mahesh Pal Singh. “Potentiometric Study Of Formation Of Quaternary Complexes Of Some Lanthanones With Multidentate Ligands”. International Journal of Advanced Research in Multidisciplinary Sciences EISSN 2581-8996, vol. 3, no. 2, Sept. 2020, pp. 138-40, https://journal.ijarms.org/index.php/ijarms/article/view/279.