@book { PersonenbezogeneDatenalsEntgelt,
    title = "Personenbezogene Daten als Entgelt",
    author = "Franziska {Leinemann}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16568",
    url = "https://www.peterlang.com/document/1058395"
}