@article{Tjaden2021,
  author    = {Jasper Tjaden},
  title     = {Measuring migration 2.0},
  journal   = {Comparative migration studies : CMS},
  series    = {a review of digital data sources},
  volume    = {9},
  number    = {1},
  doi       = {10.1186/s40878-021-00273-x},
  year      = {2021},
}