J. Hall, L. Rapanotti, und M. Jackson. Fifth IEEE International Conference on Software Engineering and Formal Methods, SEFM 2007, Seite 15-24. London, IEEE Computer Society, (September 2007)
I. Jureta, und S. Faulkner. Second International Workshop on Requirements, Intentions and Goals in Conceptual Modeling (RIGIM), Seite 302--311. Barcelona, (Oktober 2008)
B. Boehm, J. Brown, und M. Lipow. International Conference on Software Engineering, Seite 592--605. San Francisco, IEEE Computer Society Press, (1976)Later published as ``Characteristics of Software Quality'', TRW series on technology, North-Holland, 1978.