@article{AudretschKritikosSchiersch2020,
  author    = {David B. Audretsch and Alexander Kritikos and Alexander Schiersch},
  title     = {Microfirms and innovation in the service sector},
  journal   = {Small business economics},
  volume    = {55},
  number    = {4},
  pages     = {997 -- 1018},
  doi       = {10.1007/s11187-020-00366-4},
  year      = {2020},
}