@book { Unternehmenskommunikationofflineonline,
    title = "Unternehmenskommunikation offline/online",
    author = "Caja {Thimm}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093088"
}