@article{SchuhmacherWilischKussetal.2021,
  author    = {Alexander Schuhmacher and Lucas Wilisch and Michael Kuss and Andreas Kandelbauer and Markus Hinder and Oliver Gassmann},
  title     = {R\&D efficiency of leading pharmaceutical companies : a 20-year analysis},
  journal   = {Drug discovery today},
  volume    = {26},
  number    = {8},
  pages     = {1784 -- 1789},
  doi       = {10.1016/j.drudis.2021.05.005},
  year        = {2021},
}