Eissa Mohamed Almbrok, Hassana Abdelkader, and Adda Mohamed. “Potentiometric Studies of the PH Effect on the Coordination Behavior of Citric Acid Complexes With Cu²⁺ and Zn²⁺ in Heterobimetallic Complexes”. African Journal of Advanced Pure and Applied Sciences, vol. 4, no. 4, Nov. 2025, pp. 504-12, doi:10.65418/ajapas.v4i4.1690.