Podszun, Rupprecht MPI for Innovation and Competition, Max Planck Society;
https://www.kas.de/documents/252038/7995358/Restoring+Balance+to+Digital+Competition+%E2%80%93+Sensible+Rules%2C+Effective+Enforcement.pdf/7cb5ab1a-a5c2-54f0-3dcd-db6ef7fd9c78?version=1.0&t=1601365173489 (Publisher version)
Mardsen, P., & Podszun, R. (2020). Restoring Balance to Digital Competition – Sensible Rules, Effective Enforcement. Berlin: Konrad-Adenauer-Stiftung e. V.