1. Allaman, P.M., Tardiff, T.J., Dunbar, F.C.: NCHRP Report 250. New Approaches to Understanding Travel Behavior. TRB, National Research Council, Washington, DC (1982)
2. Anderson, K.: Spiffing up the urban heritage. Time Magazine. 23 November 1987, pp. 72–83 (1987)
3. Baanders, A., Kremer-Nass, J., Ruijgrok, C.J.: Income decline and travel behaviour: some recent Dutch findings and research orientations. In: Jansen, G.R.M., et al. (eds.) Transportation and Mobility in an Era of Transition, pp. 37–53. Elsevier, Amsterdam (1985)
4. Bellomo, S.J., Dial, R.B., Voorhees, A.M.: NCHRP Report 89: Factors, Trends, and Guidelines Related to Trip Length. Highway Research Board, National Research Council, Washington, DC (1970)
5. Brail, R.K., Chapin, F.S.: Activity patterns of urban residents. Environ. Behav. 5, 163–190 (1973)