@book { RainerMariaRilkeundRudolfBodlnder,
    title = "Rainer Maria Rilke und Rudolf Bodländer",
    subtitle = "Briefe in schwierigen Zeiten",
    author = "Erich {Unglaub}",
    year = "2024",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b22035",
    url = "https://www.peterlang.com/document/1453168"
}