1. ISO 9001:2015 - Quality management systems
2. ISO/IEC 25010:2011 Systems and software engineering—Systems and Software Quality
3. OMG Unified Modeling Language Version 2.5. https://www.omg.org/spec/UML/2.5/PDF
4. Marca, D.A., McGowan, C.L.: SADT: Structured Analysis and Design Techniques. McGraw-Hill, New York (1988)
5. Amjad, A., Azam, F., Anwar, M.W., Butt, W.H., Rashid, M.: Event-driven process chain for modeling and verification of business requirements-a systematic literature review. IEEE Access 6, 9027–9048 (2018)