“Development of an Extractive Spectrophotometric Method for the Determination of Copper(II) in Leafy Vegetable and Pharmaceutical Samples Using 2–acetylpyridine 4–phenyl –3-Thiosemicarbazone (APPT)”. Momona Ethiopian Journal of Science (MEJS) , vol. 4, no. 2, Mar. 2024, pp. 70-83, https://journal.mu.edu.et/index.php/mejs/article/view/120.