1. Towards trans-European Networks;Commission of the European Communities,1989
2. Towards trans-European networks;Commission of the European Communities,1991
3. Trans-European networks. Towards a Master Plan for the Road Network and Road Traffic;Commission of the European Communities,1993
4. GIS and models of accessibility potential: an application in planning;Geertman;Int J Geographical Information Systems,1995
5. Accesibilidad a los centros de actividad económica;Gutiérrez,1992