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1.
Petersen K, Gencel C, Asghari N, Betz S. An elicitation instrument for operationalising GQM+ Strategies (GQM+ S-EI). Empirical Software Engineering. 2015;20:968-1005.
Petersen, K. ., Gencel, C. ., Asghari, N. ., & Betz, S. . (2015). An elicitation instrument for operationalising GQM+ Strategies (GQM+ S-EI). Empirical Software Engineering, 20, 968–1005.
Petersen, Kai, Cigdem Gencel, Negin Asghari, und Stefanie Betz. 2015. „An Elicitation Instrument for Operationalising GQM+ Strategies (GQM+ S-EI)“. Empirical Software Engineering 20. Springer US: 968-1005.
Petersen, Kai u. a. „An Elicitation Instrument for Operationalising GQM+ Strategies (GQM+ S-EI)“. Empirical Software Engineering 20 (2015): 968–1005. Print.
Petersen, Kai, u. a. „An Elicitation Instrument for Operationalising GQM+ Strategies (GQM+ S-EI)“. Empirical Software Engineering, Bd. 20, 4, Springer US, 2015, S. 968–1005.