- Philippo E.J., Heijstek W., Kruiswijk B., Chaudron M.R.V. & Berry D.M. (2013), Requirement Ambiguity Not as Important as Expected — Results of an Empirical Evaluation. In: Proceedings 19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013).. 65-79.
- Heijstek W. (5 December 2012), Architecture design in global and model-centric software development (PhD thesis. Leiden Institute of Advanced Computer Sciences (LIACS), Faculty of Science, Leiden University) IPA Dissertation Series no. 2012-13. Supervisor(s) and Co-supervisor(s): Kok, J.N., Chaudron, M.R.V.
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