@book{Frenz+2019, url = {https://doi.org/10.3790/9783428506767}, title = {Die ordnungsrechtliche Verantwortlichkeit für austretende Grubengase}, title = {}, author = {Walter Frenz}, publisher = {Duncker & Humblot}, address = {}, doi = {doi:10.3790/9783428506767}, isbn = {9783428506767}, year = {2002}, lastchecked = {2019} }