@book { HeikleVersprechen,
    title = "Heikle Versprechen",
    author = "Christine {Spiess (Scherrer)}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-1-4539-1798-5",
    url = "https://www.peterlang.com/document/1053490"
}