1. Chung, L., Nixon, B.A.: Dealing with non-functional requirements: three experimental studies of a process-oriented approach. In: ICSE 1995: Proceedings of the 17th International Conference on Software Engineering, pp. 25–37. ACM, New York (1995)
2. Yu, E.S.K.: Towards Modeling and Reasoning Support for Early-Phase Requirements Engineering. In: RE 1997: Proceedings of the 3rd IEEE International Symposium on Requirements Engineering, Washington, DC, USA, p. 226. IEEE Computer Society, Los Alamitos (1997)
3. Horkoff, J., Yu, E.: Evaluating Goal Achievement in Enterprise Modeling An Interactive Procedure and Experiences. In: The Practice of Enterprise Modeling, pp. 145–160. Springer, Heidelberg (2009)
4. Lecture Notes in Computer Science;P. Giorgini,2004
5. Horkoff, J., Yu, E.: A Framework for Iterative, Interactive Analysis of Agent-Goal Models in Early Requirements Engineering. In: 4th International i* Workshop (submitted, 2010)