Awadallah, R.M., et al. “Molar Conductometric and Stepwise Potentiometric Studies on Chromium(III)-, Manganese(II)-, Copper(II)-, and Silver(I)- 2,2’Dipyridyl-Salicylaldoxime-Benzamide Complexes”. Asian Journal of Chemistry, vol. 7, no. 4, July 2012, pp. 801-14, https://asianpubs.org/index.php/ajchem/article/view/24421.