@book { Estudiosdelingsticahispanoamericanabrasileaycriolla,
    title = "Estudios de lingüística hispanoamericana, brasileña y criolla",
    author = "Matthias {Perl} and Klaus {Pörtl}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094269"
}