1.
Pinto NG de O. The E-Government and the New Challenges of the European Single Market. JISTEM USP [Internet]. 2009 Jul. 3 [cited 2025 Jul. 13];6(1):111-5. Available from: https://jistem.tecsi.org/index.php/jistem/article/view/10.4301%252FS1807-17752009000100006