@book { PragmticayGramtica,
    title = "Pragmática y Gramática",
    subtitle = "Condicionales concesivas en español",
    author = "Susana {Rodríguez Rosique}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105446"
}