@book { DerWhistleblowerimBeamtenrecht,
    title = "Der Whistleblower im Beamtenrecht",
    author = "Jonathan {Niermann}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15387",
    url = "https://www.peterlang.com/document/1057622"
}