GEYS, Benny; HEINEMANN, Friedrich; KALB, Alexander. Local Government Efficiency in German Municipalities. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 71, n. 4, p. 283–293, 2013. DOI: 10.1007/s13147-012-0191-x. Disponível em: https://rur.oekom.de/index.php/rur/article/view/687.. Acesso em: 23 mar. 2025.