@inproceedings{SIGMOD-1989-BorgidaBMR,
	author        = "Alexander Borgida and Ronald J. Brachman and Deborah L. McGuinness and Lori Alperin Resnick",
	booktitle     = "{Proceedings of the 19th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD89/P058.PDF",
	doi           = "10.1145/67544.66932",
	pages         = "58--67",
	title         = "{CLASSIC: A Structural Data Model for Objects}",
	year          = 1989,
}