@Book{OL9118674M,
    title: {El Dador},
    author: {Lois Lowry},
    publisher: {Editorial Everest, S. A.},
    year: {1993},
}

@Work{OL2163649W,
    title: {The Hitch Hiker's Guide to the Galaxy},
    author: {Douglas Adams},
    first_publish_year: {1979}
}

@Author{OL272947A,
    name: {Douglas Adams},
    birth_date: {11 March 1952}
    , death_date: {11 May 2001}
}