A. KASIR, F.; M. ALYAS, M. Theoretical Study of the Mean and Resultant Change of Interaction Frequency for Oxygen-Oxygen Ion Dipoles in CaF2 Crystal. Rafidain Journal of Science, [S. l.], v. 24, n. 5, p. 86–96, 2013. DOI: 10.33899/rjs.2013.74553. Disponível em: https://edusj.uomosul.edu.iq/index.php/rsci/article/view/47211. Acesso em: 10 sep. 2025.