Negative Photoconductivity Effects of Titanium Dioxide and Tungsten Oxide Prepared by Sol-Gel Method. Journal of International Academy of Physical Sciences, [S. l.], v. 14, n. 2, p. 265–271, 2010. Disponível em: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/339. Acesso em: 23 oct. 2026.