@book { UnternehmungsplanunginderPapierindustrie,
    title = "Unternehmungsplanung in der Papierindustrie",
    author = "Günther {Burris}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069402"
}