@book{Dewitz+2011, url = {https://doi.org/10.3790/9783428512348}, title = {Der Vertrag in der Lehre Otto Mayers}, title = {}, author = {Ralf Michael Dewitz}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428512348}, isbn = {9783428512348}, year = {2004}, lastchecked = {2011} }