@book { GrenzberschreitungenundWendepunkte,
    title = "Grenzüberschreitungen und Wendepunkte",
    author = "Ladislaus {Ludescher} and Marco {Wagner}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b10521",
    url = "https://www.peterlang.com/document/1050014"
}