1. Haberfellner, R., de Weck, O., Fricke, E., & Vössner, S. (2019). Systems engineering - fundamentals and application (p. 458). Springer Nature Switzerland.
2. von Bertalanffy, L. (1968). General system theory: Foundations, development, applications. In International library of systems theory and philosophy. G. Braziller.
3. ISO/IEC/IEEE 21839:2019. (2019). Systems and Software Engineering—System of Systems (SoS) considerations in life cycle stages of a system.
4. Lehman, M. M. (1980). Programs, life cycles, and laws of software evolution. Proceedings of the IEEE, 68(9), 1060–1076.
5. Avgeriou, P., Kruchten, P., Ozkaya, O., & Seaman, C. B. (2016). Managing technical debt in Software Engineering (Dagstuhl Seminar 16162). In P. Avgeriou, P. Kruchten, I. Ozkaya, & C. Seaman (Eds.), Dagstuhl reports 6.4 (pp. 110–138).