@book { Gramaticalizacinyparadigmas,
    title = "Gramaticalización y paradigmas",
    author = "Maria {Estellés}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00952-1",
    url = "https://www.peterlang.com/document/1044360"
}