1. Maturity and readiness model for industry 4.0 strategy;Akdill,2018
2. Smart factory performance and Industry 4.0;Büchi;Technol. Forecast. Soc. Change,2020
3. Bradley A. The connected enterprise maturity model. https://literature.rockwellautomation.com/idc/groups/literature/documents/wp/cie-wp002 _-en-p.pdf. Accessed 12 2019
4. Augmented and virtual reality applications in industrial systems: a qualitative review towards the industry 4.0 era;Damiani;IFAC PapersOnLine,2018
5. De Bernardini L. Three steps to start the smart manufacturing journey. https://www.automationworld.com/products/software/blog/13316170/three-steps-to-start-the-smart-manufacturing-journey. Accessed 25 .2019.