@book{Langer+2019,
url = {https://doi.org/10.3790/9783428491377},
title = {Monopole als Handlungsinstrumente der öffentlichen Hand},
title = {},
author = {Thomas Langer},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428491377},
isbn = {9783428491377},
year = {1998},
lastchecked = {2019}
}