@book { CataloniaandPortugal,
    title = "Catalonia and Portugal",
    author = "Flocel {Sabaté} and Luís Adão {Da Fonseca}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0830-9",
    url = "https://www.peterlang.com/document/1053245"
}