RESHEVETS, Igor. A system approach in the political-administrative management. Journal of Geography, Politics and Society, [S. l.], v. 5, n. 1, p. 37–42, 2015. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/JGPS/article/view/3731. Acesso em: 18 may. 2024.