@book { DerEngelderseineFlgelverlor,
    title = "Der Engel, der seine Flügel verlor",
    author = "Aylin {Duran}",
    year = "2023",
    publisher = "Herzsprung-Verlag",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1408323"
}