@inproceedings{AFJV02,
  author = "Maria Alpuente and Moreno Falaschi and Pascual Juli\'an
            and Germ\'an Vidal",
  title = "Lazy Narrowing and Needed Narrowing: A Comparison",
  booktitle = "Proceedings of the 11th International Workshop on Functional and
	(Constraint) Logic Programming, WFLP 2002, Grado, Italy, June 20-22, 2002",
  publisher = "Universit\'a degli Studi di Udine",
  pages = "13 pp",
  year = "2002",
  note = "(to appear)"
}