Eissa Mohamed Almbrok, Hassana Abdelkader and Adda Mohamed (2025) “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 , 4(4), pp. 504–512. doi: 10.65418/ajapas.v4i4.1690.