Hans-Gerd Ridder: The theory contribution of case study research designs. In: Business Research. 10, 2017, S. 281, doi:10.1007/s40685-017-0045-z.
Welch et al.: Theorising from case studies: Towards a pluralist future for international business research. In: Journal of International Business Studies. 42, 2011, S. 740–762. doi:10.1057/jibs.2010.55