ABDULLA, N. I. Gallium Selective PVC Membrane Electrodes Based on Crown Ethers. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 19, n. 1, p. 91–103, 2017. Disponível em: https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/1539. Acesso em: 1 may. 2025.