N. I. Abdulla, “Gallium Selective PVC Membrane Electrodes Based on Crown Ethers”, IHJPAS, vol. 19, no. 1, pp. 91–103, Nov. 2017, Accessed: Nov. 25, 2024. [Online]. Available: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1539