@inproceedings{SIGMOD-1980-Kim,
	author        = "Won Kim",
	booktitle     = "{Proceedings of the 10th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD80/P179.PDF",
	doi           = "10.1145/582250.582278",
	pages         = "179--187",
	publisher     = "{ACM Press}",
	title         = "{A New Way to Compute the Product and Join of Relations}",
	year          = 1980,
}