1. The World Bank. Improving SMEs’ access to finance and finding innovative solutions to unlock sources of capital. https://www.worldbank.org/en/topic/smefinance. Accessed on December 12, 2019
2. Recommendations for Implementing the Strategic Initiative INDUSTRIE 4.0: Securing the Future of German Manufacturing Industry; Final Report of the Industrie 4.0 Working Group;Kagermann,2013
3. PricewaterhouseCoopers, Industry 4.0: Building the digital enterprise, 2016 Global Industry 4.0 Survey, (2016)
4. PricewaterhouseCoopers, Industry 4.0: hype or reality? The current state of play in Flemish manufacturing, 2017 Industry 4.0 Survey, Flanders Make, (2017)
5. MarketWatch, Industry 4.0 market and technologies. Focus on the U.S: Industry, Technologies and Global Market 2018-2023, (2019) https://www.marketwatch.com/press-release/industry-40-market-and-technologies-focus-on-the-us-industry-technologies-and-global-market-2018-2023-2019-08-13, Accessed on December 12, 2019