@book { SlawischeKulturgeschichte,
    title = "Slawische Kulturgeschichte",
    author = "Helmut {Schaller}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16438",
    url = "https://www.peterlang.com/document/1111306"
}