@inproceedings{ALP-PLILP-1998-LeviS,
	author        = "Giorgio Levi and Fausto Spoto",
	booktitle     = "{Proceedings of the 10th International Symposium on Principles of Declarative Programming, Held Jointly with the Seventh International Conference on Algebraic and Logic Programming}",
	doi           = "10.1007/BFb0056613",
	isbn          = "3-540-65012-1",
	pages         = "152--169",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{An Experiment in Domain Refinement: Type Domains and Type Representations for Logic Programs}",
	volume        = 1490,
	year          = 1998,
}