1. accenture (2016) Digital Readiness Index Framework. Available at: https://www.accenture.com/t20160504T135912__w__/us-en/_acnmedia/PDF-16/Accenture-European-Financial-Services-Digital-Readiness-Report.pdf (Accessed: 1 January 2017).
2. AUDI AG (2017) Digitization and new business models. Available at: http://www.audi.com/corporate/en/sustainability/topics-and-facts/products-and-services/digitization-and-new-business-models.html (Accessed: 27 June 2017).
3. Bernhart, W. et al. (2015) ‘E-mobility index Q3 2015’. Roland Berger GmbH; Forschungsgesellschaft Kraftfahrwesen mbH Aachen. Available at: www.rolandberger.com .
4. Bicheno, J. R. & Holweg, M. (2016) The Lean Toolbox. 5th edn. United Kingdom: Picsie Books.
5. Burke, W. W. & Litwin, G. H. (1992) ‘A causal model of organizational performance and change’, Journal of Management, 18, pp. 523–545. https://doi.org/10.5539/ass.v9n9p270 .