1. Schmidt, R., Möhring, M., Keller, B., Zimmermann, A., Toni, M., Di Pietro, L.: Digital enterprise architecture management in tourism–state of the art and future directions. In: International Conference on Intelligent Decision Technologies, pp. 93–102 (2017)
2. Keller, B., Möhring, M., Toni, M., Di Pietro, L., Schmidt, R.: Data-centered platforms in tourism: advantages and challenges for digital enterprise architecture. In: International Conference on Business Information Systems, pp. 299–310 (2016)
3. Webster, J., Watson, R.T.: Analyzing the past to prepare for the future: writing a literature review. MIS Q. 26(2), pp. xiii–xxiii (2002)
4. Yin, R.: Case Study Research: Design and Methods. Sage Publishing, Beverly Hills (1994)
5. Darke, P., Shanks, G., Broadbent, M.: Successfully completing case study research: combining rigour, relevance and pragmatism. Inf. Syst. J. 8, 273–289 (1998)