Vásquez-A, M., G. Romero-Paredes, J. Andraca-Adame, and R. Peña-Sierra. “Fabrication and Characterization of ZnO:Zn(n$^{+}$)/Porous-Silicon/Si(p) Heterojunctions for White Light Emitting Diodes”. Revista Mexicana De Física, vol. 62, no. 1 Jan-Feb, Jan. 2016, pp. 5-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/4170.