@article{KregelOgonekMatthies2020,
  author    = {Ingo Kregel and Nadine Ogonek and Benjamin Matthies},
  title     = {Competency Profiles for Lean Professionals - An International Perspective},
  journal   = {International Journal of Productivity and Performance Management},
  volume    = {68 (2)},
  pages     = {423 -- 446},
  doi       = {10.1108/IJPPM-09-2017-0237},
  year      = {2020},
}