@Book{OL23361729M,
    title: {Histoire de l'art ...},
    author: {Elie Faure},
    publisher: {G. Crés \& cie},
    year: {1921},
    place: {Paris},
}

@Work{OL13170290W,
    title: {Importancia social del arte},
    author: {Elíseo Guardiola Valero},
    first_publish_year: {1907}
}

@Work{OL2343290W,
    title: {The Venus Di Milo, Its History and Its Art},
    author: {Alexander Del Mar},
    first_publish_year: {1900}
}

@Author{OL317223A,
    name: {Alexander Del Mar},
    birth_date: {1836}
    , death_date: {1926}
}