1. IBM: z/TPF – The Evolution of Transaction Processing to Open Standards. Enabling Transaction Processing for On Demand Business (October 2005)
2. Palma, A.D., Rochat, D.: Understanding Iindividual Travel Decisions: Results from a Commuters Survey in Geneva. Transportation 26, 263–281 (1999)
3. Mushtaq, A., Sulaiman, S., Dominic, P.D.D., Riaz, S.: Green Environment with Flexible Airline Reservation Systems. In: Proceedings of the ICIIT 2010, vol. 1, pp. 488–492 (2010)
4. Monsuwe, T.P., Dellaert, B.G.C., Ruyter, K.: What Drives Consumers to Shop Online? A Literature Review. International Journal of Service Industry Management 15(1), 102–121 (2004)
5. Olsen, K.A., Malizia, A.: Flexible User Interfaces for B2C Systems, Using Booking as a Case Study. In: Proceedings HCI, Las Vegas, USA (2005), http://home.himolde.no/~olsen/artikler/FlexibleUserInterfaces.pdf (accessed on July 19, 2009)