@book { MusikMusiktheaterMusiktheaterRegie,
    title = "Musik - Musiktheater - Musiktheater-Regie",
    author = "Johannes {Krogoll} and Dietrich {Steinbeck}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1113955"
}