@inproceedings{SIGMOD-1979-El-MasriW,
	author        = "Ramez Elmasri and Gio Wiederhold",
	booktitle     = "{Proceedings of the Ninth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD79/P191.PDF",
	doi           = "10.1145/582095.582127",
	isbn          = "0-89791-001-X",
	pages         = "191--202",
	publisher     = "{ACM}",
	title         = "{Data Model Integration Using the Structural Model}",
	year          = 1979,
}