@inproceedings{ICEIS-v1-2003-PequenoA,
	author        = "Valéria Magalhães Pequeno and Joaquim Nunes Aparício",
	booktitle     = "{Proceedings of the Fifth International Conference on Enterprise Information Systems, Volume 1}",
	pages         = "327--333",
	title         = "{A Formal Model for Object-Relational Databases}",
	year          = 2003,
}