@book { PersnlicheLeitungspflicht,
    title = "Persönliche Leitungspflicht",
    author = "Valentin {Mezger}",
    year = "2024",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b21826",
    url = "https://www.peterlang.com/document/1443122"
}