@book { neinundej,
    title = "«nein unde jâ»",
    subtitle = "Mehrdeutigkeit im «Tristan» Gottfrieds von Strassburg",
    author = " {Irene Lanz}",
    year = "1989",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1073916"
}