1. Lopez, L, “A Complete Definition of the Inheritance Construct in i*”. Proceeding of the ER 2009 PhD Coloquium, affiliated to the 28
th
International Conference on Conceptual Modelling (ER-2009). Brazil, 2009.
2. Yu, Eric: Social Modeling and i*. Conceptual Modeling: Foundations and Apllications. Springer, 2009.
3. Yu,Eric. S: Modelling Strategic Relationships for Process Reengineering. PhD thesis, Canada. 1996.
4. Anwer, S., Ikram, N., “Goal Oriented Requirement Engineering: A Critical Study of Techniques”, XIII ASIA PACIFIC SOFTWARE ENGINEERING CONFERENCE (APSEC’06), 2006.
5. Lapouchnian, A., “Goal-Oriented Requirements Engineering: An Overview of the Current Research”, Department of Computer Science University of Toronto, 2005.