C. Legner, T. Eymann, T. Hess, C. Matt, T. Böhmann et al., Digitalization. Opportunity and Challenge for the Business and Information Systems Engineering Community, Business & Information Systems Engineering, vol.59, pp.301-308, 2017.

T. Hess, C. Matt, A. Benlian, and F. Wiesböck, Options for Formulating a Digital Transformation Strategy, MIS Quarterly Executive, vol.15, pp.123-139, 2016.

D. Veit, E. Clemons, A. Benlian, P. Buxmann, T. Hess et al., Business Models, vol.6, pp.45-53, 2014.

B. Hinings, T. Gegenhuber, and R. Greenwood, Digital Innovation and Transformation, An Institutional Perspective. Information and Organization, vol.28, pp.52-61, 2018.

E. Windhagen, J. Bughin, J. Mischke, C. Baur, F. Mattern et al., Stimulating digital adoption in Germany, Report McKinsey Global Institute, 2017.

C. Matt, T. Hess, and A. Benlian, Digital Transformation Strategies, vol.57, pp.339-343, 2015.

A. Horlacher and T. Hess, What Does a Chief Digital Officer Do? Managerial Tasks and Roles of a New C-Level Position in the Context of Digital Transformation, Proceedings of the 49th Annual Hawaii International Conference on System Sciences. 5-8, pp.5126-5135, 2016.

M. Murawski and M. Bick, Digital competences of the workforce -a research topic?, Business Process Management Journal, vol.23, pp.721-734, 2017.

M. Fitzgerald, N. Kruschwitz, D. Bonnet, and . Welch, Embracing Digital Technology. A New Strategic Imperative, MIT Sloan Management Review, pp.1-12, 2013.

C. Kahre, D. Hoffmann, and F. Ahlemann, Beyond Business-IT Alignment -Digital Business Strategies as a Paradigmatic Shift: A Review and Research Agenda, Proceedings of the 50th Hawaii International Conference on System Sciences, pp.4706-4715, 2017.

F. Holotiuk and D. Beimborn, Critical Success Factors of Digital Business Strategy, 13th Proceedings of International Conference on Wirtschaftsinformatik, pp.991-1005, 2017.

R. Hansen and S. S. Kien, Hummel's digital transformation toward omnichannel retailing: key lessons learned, MIS Quarterly Executive, vol.14, pp.51-66, 2015.

S. Chanias and T. Hess, Understanding Digital Transformation Strategy Formation: Insights from Europe`s Automotive Industry, Pacific Asia Conference on Information Systems 2016 Proceedings, p.296, 2016.

S. Chanias, Mastering Digital Transformation: the Path of a Financial Services Provider Towards a Digital Transformation Strategy, Proceedings of the 25th European Conference on Information Systems (ECIS), 2017.

J. Peppard, R. D. Galliers, and A. Thorogood, Information systems strategy as practice: Micro strategy and strategizing for IS, The Journal of Strategic Information Systems, vol.23, pp.1-10, 2014.

J. C. Henderson and N. Venkatraman, Strategic alignment: Leveraging information technology for transforming organizations, IBM Systems Journal, vol.32, pp.4-16, 1993.

E. Brynjolfsson and A. Mcafee, The Second Machine Age. Work, Progress, and Prosperity in a Time of Brilliant Technologies, 2014.

A. Mcafee and E. Brynjolfsson, Machine, platform, crowd. Harnessing our digital future, 2017.

A. Bharadwaj, O. El-sawy, P. A. Pavlou, and N. Venkatraman, Digital Business Strategy: Toward a Next Generation of Insights, MIS Quarterly, vol.37, pp.471-482, 2013.

H. R. Bernard, Social research method. Qualitative and quantitative approaches, 2013.

L. A. Palinkas, S. M. Horwitz, C. A. Green, J. P. Wisdom, N. Duan et al., Purposeful Sampling for Qualitative Data Collection and Analysis in Mixed Method Implementation Research. Administration and policy in mental health, vol.42, pp.533-544, 2015.

M. Hennink, I. Hutter, and A. Bailey, Qualitative Research Methods. SAGE Publications Ltd, 2011.

J. Mason, Qualitative Researching, 2012.

G. Guest, A. Bunce, and L. Johnson, How Many Interviews Are Enough?, Field Methods, vol.18, pp.59-82, 2006.

D. A. Gioia, K. G. Corley, and A. L. Hamilton, Seeking Qualitative Rigor in Inductive Research, Organizational Research Methods, vol.16, pp.15-31, 2013.

W. K. Smith, Dynamic Decision Making. A Model of Senior Leaders Managing Strategic Paradoxes, Academy of Management Journal, vol.57, pp.1592-1623, 2014.

C. M. Christensen, Innovator's Dilemma: When New Technologies Cause Great Firms to Fail (management of innovation and change series), Harvard Business Review, 1997.

S. Denning, Christensen updates disruption theory, Strategy & Leadership, vol.44, pp.10-16, 2016.

T. Ravichandran, Exploring the Relationships Between IT Competence, Innovation Capacity and Organizational Agility, The Journal of Strategic Information Systems, vol.27, pp.22-42, 2018.

N. G. Carr, IT Doesn't Matter, Harvard Business Review, vol.81, pp.41-49, 2003.

N. G. Carr, The Big switch. Rewiring the world, 2009.

D. A. Whetten, What Constitutes a Theoretical Contribution?, The Academy of Management Review, vol.14, pp.490-495, 1989.

R. J. House, P. W. Dorfman, and M. Javidan, Strategic leadership across cultures. The GLOBE study of CEO leadership behavior and effectiveness in 24 countries, 2013.

G. Hofstede, What about Germany?

G. Hofstede, G. J. Hofstede, and M. Minkov, Cultures and organizations. Software for the mind, 2010.

E. H. Schein, Organizational Culture and Leadership. Jossey-Bass, 2010.

T. Kummer, J. M. Leimeister, and M. Bick, On the Importance of National Culture for the Design of Information Systems, Business & Information Systems Engineering, vol.4, pp.317-330, 2012.