@book { DerLeistungsmastabimArbeitsverhltnis,
    title = "Der Leistungsmaßstab im Arbeitsverhältnis",
    author = "Florian {Schiffer}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04855-1",
    url = "https://www.peterlang.com/document/1048505"
}