“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)”, mejs, vol. 4, no. 2, pp. 70–83, Mar. 2024, Accessed: Sep. 16, 2024. [Online]. Available: https://journal.mu.edu.et/index.php/mejs/article/view/120