FRÖHLICH, Philipp; TSCHOPP, Martin; AXHAUSEN, Kay W. Development of the accessibility of Swiss municipalities: 1950 to 2000. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 63, n. 6, p. 385–399, 2005. DOI: 10.1007/BF03182968. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1420. Acesso em: 15 aug. 2026.