@book { TypologiedesMarketingManagement,
    title = "Typologie des Marketing-Management",
    author = "Andreas {Seifert}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13649",
    url = "https://www.peterlang.com/document/1068242"
}