@book{9783732905225,
  title = {Handbuch Bulgarien},
  editor = {Gergana Börger,Sigrun Comati,Thede Kahl},
  publisher = {Frank \& Timme},
  year = {2019},
  edition = {1},
  series = {Forum: Bulgarien},
  volume = {6},
  url = {https://www.frank-timme.de/en/programme/product/handbuch\_bulgarien}
}