@article{GregerMulyonoHermannetal.2018,
  author    = {Marius Greger and Nur Budi Mulyono and Julian Hermann and Daniel Palm},
  title     = {Digital twins in the smart factory},
  journal   = {Journal of engineering, management and operations},
  volume    = {1},
  pages     = {41 -- 54},
  year        = {2018},
}