@book { OskarKokoschkaMalerundDichter,
    title = "Oskar Kokoschka: Maler und Dichter",
    author = "Gerhard Johann {Lischka}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069388"
}