@book{Nefzger+2013, url = {https://doi.org/10.3790/9783428539697}, title = {Vertragliche Abtretungsverbote}, title = {}, author = {Alexander Nefzger}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428539697}, isbn = {9783428539697}, year = {2013}, lastchecked = {2013} }