@book { DerCourtageanspruchdesVersicherungsmaklers,
    title = "Der Courtageanspruch des Versicherungsmaklers",
    author = "Britta {Netzband}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15639",
    url = "https://www.peterlang.com/document/1110829"
}