@book { LiteraturindenBriefenDrosteHlshoffs,
    title = "Literatur in den Briefen Droste-Hülshoffs",
    author = "Heike {Spies}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1136086"
}