@conference {simidat49, title = {Multiobjective genetic algorithm for extractiong subgroup discovery fuzzy rules}, booktitle = {2007 IEEE Symposium on Computational Intelligence in Multicriteria Decision Making (IEEE MCDM)}, year = {2007}, pages = {50-57}, publisher = {Omnipress}, organization = {Omnipress}, address = {Honolulu (USA)}, author = {P. Gonz{\'a}lez and M. J. del Jesus and F. Herrera} }