@book { DieLeberzirrhosenunddieprimrenLeberkarzinome,
    title = "Die Leberzirrhosen und die primären Leberkarzinome",
    author = "Hans Rudolf {Heer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069199"
}