GANKOVA-IVANOVA, Zwetelina. Modernization of Public Administration and e-Government in Bulgaria. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 3, p. 11–15, 2015. DOI: 10.17770/etr2013vol3.870. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/870.. Acesso em: 5 may. 2024.