“Synthesis, Characterization and Application of Calcium Ion-Imprinted Polymeric Solid-Phase Extraction and Pre-Concentration in Aqueous Solutions by Packed-Bed Columns”. Iraqi Journal of Science 64, no. 11 (November 30, 2023): 5462–5475. Accessed May 18, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7758.