@inproceedings{SIGMOD-1982-KambayashiYY,
	author        = "Yahiko Kambayashi and Masatoshi Yoshikawa and Shuzo Yajima",
	booktitle     = "{Proceedings of the 12th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD82/P151.PDF",
	doi           = "10.1145/582353.582381",
	pages         = "151--160",
	publisher     = "{ACM Press}",
	title         = "{Query Processing for Distributed Databases Using Generalized Semi-Joins}",
	year          = 1982,
}