1. Change Vision, Inc.: Astah professional.
https://astah.net/products/astah-professional/
. Accessed May 2020
2. Finkelstein, A., Dowell, J.: A comedy of errors: the London ambulance service case study. In: IWSSD 1996, p. 2. IEEE Computer Society (1996)
3. Geraldino, G.C.L., Santander, V.F.A.: The JGOOSE tool. In: Pimentel, J., Carvallo, J.P., López, L. (eds.) Proceedings of the 12th International i* Workshop co-located with 38th International Conference on Conceptual Modeling (ER 2019), Salvador, Brazil, 4 November 2019. CEUR Workshop Proceedings, vol. 2490. CEUR-WS.org (2019).
http://ceur-ws.org/Vol-2490/paper14.pdf
4. Horkoff, J., Maiden, N.A.M.: Creative leaf: a creative iStar modeling tool. In: Proceedings of the Ninth International i* Workshop co-located with 24th International Conference on Requirements Engineering (RE 2016), Beijing, China, 12–13 September 2016, pp. 25–30 (2016).
http://ceur-ws.org/Vol-1674/iStar16_pp25-30.pdf
5. Jackson, M.: Problem Frames, Analyzing and Structuring Software Development Problems. Addison-Wesley, Boston (2000)