@book { DiebetriebsbedingteKndigung,
    title = "Die betriebsbedingte Kündigung",
    author = "Christian {Betschel}",
    year = "2001",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640013173",
    url = "https://www.hausarbeiten.de/document/102937"
}