1. Abrell, T., Pihlajamaa, M., Kanto, L., vom Brocke, J., & Uebernickel, F. (2016). The role of users and customers in digital innovation: Insights from B2B manufacturing firms. Information & Management, 53(3), 324–335. https://doi.org/10.1016/j.im.2015.12.005
2. acatech. (2015). Smart service welt: Recommendations for the strategic initiative web-based services for businesses. Final report. acatech - National Academy of Science and Engineering. https://en.acatech.de/publication/recommendations-for-the-strategic-initiative-web-based-services-for-businesses-final-report-of-the-smart-service-working-group/
3. Alt, R. (2019). Electronic markets on digital transformation methodologies. Electronic Markets, 29(3), 307–313. https://doi.org/10.1007/s12525-019-00370-x
4. Angermeier, D., Bartelt, C., Bauer, O., Beneken, G., Bergner, K., Birowicz, U., Bliß, T., Breitenstrom, C., Cordes, N., Cruz, D., Dohrmann, P., Friedrich, J., Gnatz, M., Hammerschall, U., Hidvegi-Barstorfer, I., Hummel, H., Israel, D., Klingenberg, T., Klugseder, K., … Wittmann, M. (2019). V-Modell XT (Weit e.V., Ed.). http://ftp.tu-clausthal.de/pub/institute/informatik/v-modell-xt/Releases/2.3/Dokumentation/V-Modell-XT-HTML/index.html
5. Anke, J., Ebel, M., Poeppelbuss, J., & Alt, R. (2020a). How to tame the Tiger—exploring the means, ends and challenges in smart service systems engineering. European Conference on Information Systems (ECIS). https://aisel.aisnet.org/ecis2020_rp/155