Alfonso-Orjuela, J., D. Andrade-Zambrano, J. Arro, and o-Osorio. “Refractive Index of Multiline Nanosecond Laser-Induced Periodic Surface Structures and Porous Silicon”. Revista Mexicana De Física, vol. 57, no. 6, Jan. 2011, pp. 475-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3866.