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Reilly, Edwin D., Anthony Ralston, and David Hemmendinger. Encyclopedia of Computer Science. 4th ed. London : New York: Nature Pub. Group ; Published in the United States and Canada by Grove's Dictionaries, 2000.

Reilly, Edwin D., et al. Encyclopedia of Computer Science. 4th ed. Nature Pub. Group ; Published in the United States and Canada by Grove's Dictionaries, 2000.