@book { AktuelleBewertungderKraftWrmeKopplung,
    title = "Aktuelle Bewertung der Kraft-Wärme-Kopplung",
    author = "Klaus {Traube} and Wolfgang {Schulz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1090760"
}