@Book{OL23260266M,
    title: {Intermediate algebra},
    author: {Marvin L. Bittinger},
    publisher: {Addison-Wesley},
    year: {1990},
    place: {Reading, Mass},
}

@Author{OL20323A,
    name: {Marvin L. Bittinger},
    birth_date: {1941}
}