@book { FriedrichKatz,
    title = "Friedrich Katz",
    author = "Martina {Kaller} and David {Mayer} and Berthold {Molden}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01828-8",
    url = "https://www.peterlang.com/document/1047216"
}