@book { Variatiodelectat,
    title = "Variatio delectat",
    author = "Peter {Gilles} and Joachim {Scharloth} and Evelyn {Ziegler}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107339"
}