1. McFarlane, D., Ratchev, S., Thorne, A., Parlikad, A.K., De Silva, L., Schönfuß, B., Hawkridge, G., Terrazas, G., Tlegenov, Y.: Digital manufacturing on a shoestring: low cost digital solutions for SMEs. In: SOHOMA, pp. 40–51. Springer, Cham (2019)
2. McFarlane, D., Ratchev, S., de Silva, L., Hawkridge, G., Schönfuβ, B., Terrazas, G.: Digitalisation for SME manufacturers: a framework and a low cost approach. submitted to SOHOMA 2021 (2021)
3. Lu, Y.: Industry 4.0: a survey on technologies, applications and open research issues. J. Ind. Inf. Integr. 6, 1–10 (2017)
4. Westerman, G., Bonnet, D., McAfee, A.: The nine elements of digital transformation. MIT Sloan Manag. Rev. 55(3), 1–6 (2014)
5. Geissbauer, R., Vedso, J., Schrauf, S.: Industry 4.0: Building the Digital Enterprise. Global Industry 4.0 Survey, PwC (2016)