A Highly Integrated Tool Set for Program Development Support. - Gregor Engels; Thorsten Janning; Wilhelm Schäfer (SIGSMALL/PC, 1988)

Traceability between requirements and design: a transformational approach. - Jürgen Börstler; Thorsten Janning (COMPSAC, 1992)

Requirements engineering und programmieren im Grossen: Integration von Sprachen und Werkzeugen. - Thorsten Janning (Dt. Univ.-Verlag, 1992)

Transition Between Different Working Areas: Vertical Integration Tools. - Martin Lefering; Thorsten Janning (IPSEN Book, 1996)

Integration of Different Perspectives: The Requirements Engineering Environment. - Martin Lefering; Christine Kohring; Thorsten Janning (IPSEN Book, 1996)