@article{beier2020industry,
  title = {Industry 4.0: How it is defined from a sociotechnical perspective and how much sustainability it includes – A literature review}
  author = {Beier, Grischa and Ullrich, André and Niehoff, Silke and Reißig, Malte and Habich, Matthias},
  journal = {Journal of Cleaner Production},
  url = {https://www.sciencedirect.com/science/article/pii/S0959652620309033},
  year = {2020}
}