@book { RechteausnichtigenVertragsverhltnissen,
    title = "Rechte aus nichtigen Vertragsverhältnissen",
    author = "Michael {Stöber}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-07029-3",
    url = "https://www.peterlang.com/document/1050722"
}