@book { Auslsekriterienfrconvenants,
    title = "Auslösekriterien für convenants",
    author = "Wolfgang {Lachenmann}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832438548",
    url = "https://m.diplom.de/document/219323"
}