@ARTICLE{AndOrLogicTPDS91,
        author = "B. Ramkumar and L.V. Kale",
        title = "Machine Independent {AND} and {OR} Parallel
            Execution of Logic Programs: {P}art {I and II}",
        journal = "IEEE Transactions on Parallel and Distributed Systems",
        volume = 5,
        number = 2,
        month = "Feb.",
        year = "1991",
        group = Y,
}