@incollection{2021:metzger:access_to_, title = {Access to and porting of data under contract law: Consumer protection rules and market-based principles}, year = {2021}, note = {}, booktitle = {Data Access, Consumer Interests and Public Welfare}, pages = {287--318}, edition = {1}, author = {Metzger, Axel}, publisher = {Nomos}, address = {Baden-Baden}, series = {}, volume = {} }