@book { ElDuendeEspeculativosobrelaVidaCivil,
    title = "El Duende Especulativo sobre la Vida Civil",
    author = "Klaus-Dieter {Ertler}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135740"
}