@inproceedings { 262, title = {Exploring the Effectiveness of Normative i* Modelling: Results from a Case Study on Food Chain Traceability.}, journal = {20th International Conference on Advanced Information Systems Engineering (CAiSE'08)}, year = {2008}, month = {16/06/2008}, address = {Montpellier, France}, author = {Siena, A. and Maiden, N. and Lockerbie, J. and Karlsen, K. and Perini, A. and Susi, A.} }