Balderas-Xicohténcatl, R., S. Carmona-Tellez, and C. Falcony. “Y$_2$O$_3$:D{y}$^{3+}$/L{i}$^{+}$ Phosphors Synthesized by Spray”. Revista Mexicana De Física, vol. 63, no. 4 Jul-Aug, Jan. 2017, pp. 372-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/357.