1. Arentze, T.A., Timmermans, H.J.P.: Social networks, social interactions, and activity-travel behavior: a framework for microsimulation. Environ. Plan. B 35, 1012–1027 (2008)
2. Atkinson, R., Kintrea, K.: Disentangling area effects: evidence from deprived and non-deprived neighbourhoods. Urban Stud. 38, 2277–2298 (2001)
3. Axhausen, K.W.: Social networks and travel: some hypotheses. In: Donaghy, K.P., Poppelreuter, S., Rudinger, G. (eds.) Social dimensions of sustainable transport: transatlantic perspectives, pp. 90–108. Ashgate, Aldershot (2005)
4. Baym, N., Zhang, Y.B., Lin, M.-C.: Social interaction across media: interpersonal communication on the internet, face-to-face, and telephone. New Media Soc. 6, 41–60 (2004)
5. Boase J, Horrigan J, Wellman B, Rainie L (2006) The Strength of Internet Ties. Washington, DC: Pew Internet and American Life Project. http://www.pewinternet.org/~/media/Files/Reports/2006/PIP_Internet_ties.pdf.pdf Accessed 11 June 2013