Oemig, Christoph. “When Analysts Turn into Boxers: An Introduction to Pre-Sales Requirements Engineering”. Complex Systems Informatics and Modeling Quarterly, no. 3 (August 3, 2015): 1–14. Accessed March 7, 2026. https://csimq-journals.rtu.lv/csimq/article/view/csimq.2015-3.01.