@book { HermyniaZurMhlen,
    title = "Hermynia Zur Mühlen",
    subtitle = "Eine Biographie",
    author = "Manfred {Altner}",
    year = "1997",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1085973"
}