“Photocatalytic Activity of Nitrogen-Doped and Undoped Titanium Dioxide Sputtered Thin Films”. Superficies y Vacío 25, no. 3 (September 15, 2012): 161–165. Accessed April 24, 2025. https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/198.