@Book{OL4411103M,
    title: {Whole body fitness},
    author: {Dan Millman},
    publisher: {Clarkson N. Potter : distributed by Crown Publishers},
    year: {1979},
    place: {New York},
}

@Work{OL5552583W,
    title: {Hagakure},
    author: {Tsunetomo Yamamoto},
    first_publish_year: {1973}
}

@Author{OL1327603A,
    name: {Tsunetomo Yamamoto},
    birth_date: {1659}
    , death_date: {1719}
}