1. Amundsveen, R., 2004. Hva betyr konkurranse for effektiviteten i flyrutemarkedet? Master Thesis, Bodø Graduate School of Business.
2. Competitive regimes within the European bus industry: theory and practice;Banister;Transportation Research Part A,1992
3. Collusion, predation and merger in the UK bus industry;Beesley;Journal of Transport Economics and Policy,1990
4. Transport Economics;Button,2010
5. Modern Industrial Organization;Carlton,2005