@inproceedings{SIGMOD-1997-AtzeniT,
	author        = "Paolo Atzeni and Riccardo Torlone",
	booktitle     = "{Proceedings of the 27th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD97/P528.PDF",
	doi           = "10.1145/253260.253393",
	pages         = "528--531",
	publisher     = "{ACM Press}",
	title         = "{MDM: a Multiple-Data-Model Tool for the Management of Heterogeneous Database Schemes}",
	year          = 1997,
}