@Book{OL24745675M,
    title: {Cosmos},
    author: {Carl Sagan},
    publisher: {Random House},
    year: {1980},
    place: {New York},
}

@Book{OL352188M,
    title: {Flatland},
    author: {Edwin Abbott Abbott},
    publisher: {Shambhala},
    year: {1999},
    place: {Boston},
}

@Author{OL20585A,
    name: {Edwin Abbott Abbott},
    birth_date: {20 Dec 1838}
    , death_date: {12 Oct 1926}
}