@book { SprachkontaktedesPortugiesischen,
    title = "Sprachkontakte des Portugiesischen",
    author = "Joachim {Born} and Anna {Ladilova}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-631-69961-4",
    url = "https://www.peterlang.com/document/1054775"
}