@inproceedings{ECOOP-1997-Almeida,
	author        = "Paulo Sérgio Almeida",
	booktitle     = "{Proceedings of the 11th European Conference on Object-Oriented Programming}",
	doi           = "10.1007/BFb0053373",
	isbn          = "3-540-63089-9",
	pages         = "32--59",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Balloon Types: Controlling Sharing of State in Data Types}",
	volume        = 1241,
	year          = 1997,
}