E, J., J. Díaz-Re, es., and J. A. “Structural Properties of WO$_{3}$ Dependent of the Annealing Temperature Deposited by Hot-Filament Metal Oxide Deposition”. Revista Mexicana De Física, vol. 58, no. 6, Jan. 2012, pp. 504-9, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3955.