1. Krogstie, J., Lyytinen, K., Opdahl, A.L., Pernici, B., Siau, K., Smolander, K.: Research areas and challenges for mobile information systems. International Journal of Mobile Communications 2(3), 220–234 (2004)
2. Yu, E.: Modelling strategic relationships for process reengineering. Ph.D. Thesis, University of Toronto (1995)
3. Bresciani, P., Perini, A., Giorgini, P., Giunchiglia, F., Mylopoulos, J.: Tropos: An agent-oriented software development methodology. Autonomous Agents and Multi-Agent Systems 8(3), 203–236 (2004)
4. Liaskos, S., McIlraith, S., Mylopoulos, J.: Representing and reasoning with preference requirements using goals. Technical report, Dept. of Computer Science, University of Toronto (2006),
ftp://ftp.cs.toronto.edu/pub/reports/csrg/542
5. Ali, R., Dalpiaz, F., Giorgini, P.: Location-based variability for mobile information systems. Technical Report DISI-08-008, DISI, University of Trento,
http://eprints.biblio.unitn.it/archive/00001351/