@book { KontrastivePhonetik,
    title = "Kontrastive Phonetik",
    subtitle = "Deutsch - Brasilianisches Portugiesisch",
    author = "Kai Dieter {Langer}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135586"
}