Villamizar Amado, A.L., Lizarazo , Z., Arias Hernández, N.A. , Molina Prado, M.L. and Tebaldi, M. 2019. Diffraction efficiency in coupling quasi-degenerated in photorefractive materials. BISTUA REVISTA DE LA FACULTAD DE CIENCIAS BASICAS. 17, 2 (Aug. 2019), 151–157. DOI:https://doi.org/10.24054/bistua.v17i2.244.