Ferneda, Edilson, Luiza Beth Nunes Alonso, and Lamartine Vieira Braga. “Digital Certification in the Brazilian Egovernment”. Journal of Information Systems and Technology Management 8, no. 2 (August 31, 2011): 331–346. Accessed July 11, 2025. https://jistem.tecsi.org/index.php/jistem/article/view/10.4301%252FS1807-17752011000200004.