@book { StandundTendenzenderLeistungsentlhnung,
    title = "Stand und Tendenzen der Leistungsentlöhnung",
    author = "Urs {Nussbaumer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069741"
}