19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013) In: ICB Research Reports - Forschungsberichte des ICB / 2013 This text is provided by DuEPublico, the central repository of the University Duisburg-Essen. This version of the e-publication may differ from a potential published print or online version. DOI: https://doi.org/10.17185/duepublico/47034 URN: urn:nbn:de:hbz:464-20180914-144539-1 Link: https://duepublico.uni-duisburg-essen.de/servlets/DocumentServlet?id=47034 License: As long as not stated otherwise within the content, all rights are reserved by the authors / publishers of the work. Usage only with permission, except applicable rules of german copyright law. Source: ICB-Research Report No. 56, July 2013