@book { DieRollenbeurteilungvonHandelsvertretungen,
    title = "Die Rollenbeurteilung von Handelsvertretungen",
    author = "",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13595",
    url = "https://www.peterlang.com/document/1068192"
}