1. Aburub, F., Odeh, M. and Beeson, I. (2007) Modeling Non-Functional Requirements for Business Process. J. Information and Software Technology. 49(11-12) (November 2007), 1162--1171. DOI= 10.1016/j.infsof.2006.12.002.
2. Chung, L., Nixon, B. and Mylopoulos, J. (2000) Non-Functional Requirements in Software Engineering. Kluwer Academic Publishers., London, UK.
3. Martino, B., Esposito, A., Nacchia, S. and Maisto, S. 2015. Semantic annotation of BPMN: current approaches and new methodologies. In Proceedings of the 17th International Conference on Information Integration and Web-based Applications & Services (Brussels, Belgium --- December 11-13, 2015). iiWAS' 2015. ACM, New York, NY, 204--209. DOI= 10.1145/2837185.2837257.
4. Odeh, Y. 2015. GQ-BPAOntoSOA: A goal- and object-based semantic framework for deriving software services from an organisations goals and riva business process architecture. Doctoral Thesis. URL:https://eprints.uwe.ac.uk/secure/25286., University of the West of England.
5. Sommerville, I. 2016. Software Engineering. Pearson., Essex, UK.