Widmer, Philippe K., George Elias, and Peter Zweifel. “Improving Efficiency through Consolidation of Jurisdictions? Evidence from the Cantons of Switzerland”. Raumforschung und Raumordnung | Spatial Research and Planning 71, no. 4 (August 31, 2013): 295–305. Accessed August 15, 2026. https://rur.oekom.de/index.php/rur/article/view/688.