1. IEEE Std. 830-1998, IEEE Standard for Software Requirement Specification (1998)
2. Berenbach, B., Inc, S.C.R., Princeton, N.J.: The evaluation of large, complex UML analysis and design models. ICSE (2004)
3. Bittner, K., Spence, I.: Use Case Modeling. Addison-Wesley, Boston (2002)
4. Brown, E.K., Miller, J.E.: Syntax: a linguistic introduction to sentence structure. Routledge (1992)
5. Bruegge, B., Dutoit, A.H.: Object-Oriented Software Engineering Using UML, Patterns, and Java. Prentice-Hall, Englewood Cliffs (2009)