@Work{OL15415815W,
    title: {Nozze di Figaro},
    author: {Wolfgang Amadeus Mozart},
    first_publish_year: {1807}
}

@Work{OL3915348W,
    title: {The grammar of conducting},
    author: {Max Rudolf},
    first_publish_year: {1950}
}

@Author{OL712818A,
    name: {Max Rudolf},
    birth_date: {1902}
}