Diffraction efficiency in coupling quasi-degenerated in photorefractive materials. BISTUA Revista de la Facultad de Ciencias Básicas, [S. l.], v. 17, n. 2, p. 151–157, 2019. DOI: 10.24054/bistua.v17i2.244. Disponível em: https://ojs.unipamplona.edu.co/index.php/bistua/article/view/244. Acesso em: 15 oct. 2025.