@book{Weckwerth+2015, url = {https://doi.org/10.3790/9783428495504}, title = {Eine nachfrageorientierte Innovationstheorie}, title = {}, author = {Joachim Weckwerth}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428495504}, isbn = {9783428495504}, year = {1999}, lastchecked = {2015} }