@book{Schäfer+2021, url = {https://doi.org/10.3790/9783428509904}, title = {Öffentliche Belange im Auftragswesen und Europarecht}, title = {}, author = {Alexander Schäfer}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428509904}, isbn = {9783428509904}, year = {2003}, lastchecked = {2021} }