@book { DasWiderrufsrechtbeiFernabsatzvertrgen,
    title = "Das Widerrufsrecht bei Fernabsatzverträgen",
    author = "Zeynep {Dönmez}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04935-0",
    url = "https://www.peterlang.com/document/1048776"
}