@book { MosaikEuropas,
    title = "Mosaik Europas",
    author = "Horst {Haselsteiner} and Doris {Wastl-Walter}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108724"
}