@book{Haller+2019, url = {https://doi.org/10.3790/9783428558032}, title = {Digitale Inhalte als Herausforderung für das BGB}, title = {}, author = {Carl Jacob Haller}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428558032}, isbn = {9783428558032}, year = {2019}, lastchecked = {2019} }