1. 3iBS Project: D26.11 IT Platform Guidelines for Vehicle and Back-office System. 2014. Available at: http://www.3ibs.eu/en/publications.
2. 3iBS Project: D26.12 IT Platform Guidelines for Back-office Systems Interoperability. 2014. Available at: http://www.3ibs.eu/en/publications.
3. 3iBS Project: D26.13 IT Platform Guidelines for Vehicle Installation. 2014. Available at: http://www.3ibs.eu/en/publications.
4. 3iBS Project: Priority actions for the fast development of innovative Bus Systems in European cities. 2015. Available at: http://www.3ibs.eu/en/publications.
5. Andersson, T., Wikström, L., Karlsson, M. 2010. D2.1.2. Appendix A. Empirical studies of passenger behaviour and the creation of personas.