@Book{OL31905946M,
    title: {Pán Prsteňov},
    author: {J.R.R. Tolkien},
    publisher: {Slovart},
}

@Book{OL10681986M,
    title: {The Fellowship of the Ring},
    author: {J.R.R. Tolkien},
    publisher: {Ballantine Books},
    year: {1973},
    place: {New York, USA},
}

@Book{OL31879906M,
    title: {The Two Towers},
    author: {J.R.R. Tolkien},
    publisher: {Houghton Mifflin Company},
}

@Author{OL26320A,
    name: {J.R.R. Tolkien},
    birth_date: {3 January 1892}
    , death_date: {2 September 1973}
}