@book { DieAnredeimPortugiesischen,
    title = "Die Anrede im Portugiesischen  ",
    author = "Gunther {Hammermüller}",
    year = "2022",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b19310",
    url = "https://www.peterlang.com/document/1278710"
}