@book { DieHimmelsindleer,
    title = "Die Himmel sind leer",
    author = "Joachim {Wink}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06140-6",
    url = "https://www.peterlang.com/document/1049416"
}