@inproceedings{SIGMOD-1993-MeseguerQ,
	author        = "José Meseguer and Xiaolei Qian",
	booktitle     = "{Proceedings of the 23rd ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD93/P089.PDF",
	doi           = "10.1145/170035.170057",
	pages         = "89--98",
	publisher     = "{ACM Press}",
	title         = "{A Logical Semantics for Object-Oriented Databases}",
	year          = 1993,
}