@book { DasmoderneTheaterinsterreich,
    title = "Das moderne Theater in Österreich",
    author = "Krzysztof {Tkaczyk}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b19043",
    url = "https://www.peterlang.com/document/1159548"
}