@Book{OL3969754M,
    title: {Bel-Ami},
    author: {Guy de Maupassant},
    publisher: {Oxford University Press},
    year: {2001},
    place: {Oxford},
}

@Author{OL29388A,
    name: {Guy de Maupassant},
    birth_date: {5 Aug 1850}
    , death_date: {2 Mar 1893}
}