J. R. Warnes Lora, L. J. Quintero-Rodríguez, B. Tshibangu-Mbuebue, A. García-Juárez, and I. E. Zaldívar-Huerta, “Review of SDM/WDM technology and its application in data transmission”, Supl. Rev. Mex. Fis., vol. 2, no. 1 Jan-Mar, pp. 91–97, Mar. 2021.