@book { ETAHoffmannsWegzurOper,
    title = "E. T. A. Hoffmanns Weg zur Oper",
    author = "Diau-Long {Shen}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05919-9",
    url = "https://www.peterlang.com/document/1049424"
}