1. The American Association for Public Opinion Research (AAPOR): Standard definitions: final dispositions of case codes and outcome rates for surveys, 7th edn. AAPOR. http://www.aapor.org/Standard_Definitions2.htm (2011). Accessed 26 Sep 2011
2. Alsnih, R.: New technology and travel surveys: the way forward, Working Paper ITS-WP-04-11. Institute of Transport Studies, University of Sydney, Sydney (2004)
3. Alsnih, R.: Characteristics of web-based surveys and applications in travel research, CD-Rom of the ISCTSC conference, August 2004, Costa Rica (2005)
4. Ampt, E.S.: Response rates—do they matter? In: Bonnel, P., Chapleau, R., Lee-Gosselin, M., Raux, C. (eds.) Les enquêtes de déplacements urbains: mesurer le présent, simuler le futur, pp. 115–125. Programme Rhône-Alpes Recherches en Sciences Humaines, Lyon (1997)
5. Armoogum, J., Axhausen, K., Hubert, J.-P., Madre, J.-L.: Immobility and mobility seen through trip-based versus time-use surveys. Transp. Rev. 28, 641–658 (2005)