@book { VariableGeometrie,
    title = "Variable Geometrie",
    author = "Marjolaine {Savat-Gündüz}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03808-8",
    url = "https://www.peterlang.com/document/1044492"
}