@Book{OL39472960M,
    title: {Matilda},
    author: {Roald Dahl},
    publisher: {Alfaguara juvenil},
    year: {2013},
    place: {Mexico},
}

@Book{OL24388091M,
    title: {Charlie y la fábrica de chocolate},
    author: {Roald Dahl},
    publisher: {Alfaguara},
    year: {1986},
    place: {Madrid, Spain},
}

@Author{OL34184A,
    name: {Roald Dahl},
}