Stan Bühne, Günter Halmans, Klaus Pohl, Matthias Weber, Henning Kleinwechter, Thomas Wierczoch. Defining Requirements at Different Levels of Abstraction. In 12th IEEE International Conference on Requirements Engineering (RE 2004), 6-10 September 2004, Kyoto, Japan. pages 346-347, IEEE Computer Society, 2004. [doi]
Abstract is missing.