@inproceedings{VLDB-1981-LienST,
	author        = "Y. Edmund Lien and Jonathan E. Shopiro and Shalom Tsur",
	booktitle     = "{Proceedings of the Seventh International Conference on Very Large Data Bases}",
	cdrom         = "VLDB81/P465.PDF",
	pages         = "465--477",
	publisher     = "{IEEE Computer Society}",
	title         = "{DSIS — A Database System with Interrelational Semantics}",
	year          = 1981,
}