@book{Teupen+2010,
url = {https://doi.org/10.3790/9783428523252},
title = {»Copyleft« im deutschen Urheberrecht},
title = {Implikationen von Open Source Software (OSS) im Urhebergesetz},
author = {Christian Teupen},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428523252},
isbn = {9783428523252},
year = {2007},
lastchecked = {2010}
}