1. IEEE Recommended Practice for Software Requirements Specifications (IEEE Std. 830 1998) (1998)
2. Borgida, A., Mylopoulos, J., Reiter, R.: On the frame problem in procedure specifications. IEEE Transactions on Software Engineering 21, 785–798 (1995)
3. Lecture Notes in Computer Science;D. Costal,2002
4. D’Souza, D.F., Wills, A.C.: Objects, Components and Frameworks with UML: The Catalysis Approach. Addison-Wesley, Reading (1998)
5. Davis, A.M.: Software Requirements: Objects, Functions and States. Prentice Hall, Englewood Cliffs (1993)