@book{GroenerKoehlerKnorr2018, author = {Helmut Gr{\"o}ner and Helmut K{\"o}hler and Andreas Knorr}, title = {Liberalisierung der Telekommunikationsm{\"a}rkte}, publisher = {Haupt}, address = {Bern}, isbn = {3-258-05227-1}, pages = {113}, year = {2018}, abstract = {.}, language = {de} }