1. Bergström, A., 2003. More effective winter maintenance method for cycleways. Paper presented at TRB 82nd Annual Meeting, January 12–16, 2003, Section A3C09––Winter Maintenance, Washington DC
2. Danish Road Directorate, 1995. The potential of cycling in urban areas. Traffic safety and environment R17, Copenhagen, Denmark (in Danish, English summary)
3. Davies, D.G., Halliday, M.E., Mayes, M., Pocock, R.L., 1997. Attitudes to cycling––a qualitative study and conceptual framework. TRL Report 266, Transport Research Laboratory, Berkshire, England
4. The impact of weather on cycle flows;Emmerson,1998
5. Forward, S., 1998. Mode of transport on short journeys: attitudes and behaviour of the inhabitants of Gothenburg. VTI report 437, Swedish National Road and Transport Research Institute, Linköping, Sweden (in Swedish, English summary)