@conference {simidat221, title = {Analysis of the Impact of Using Different Diversity Functions for the Subgroup Discovery Algorithm NMEEF-SD}, booktitle = {5th International Workshop on Genetic and Evolutionary Fuzzy Systems (GEFS)}, year = {2011}, month = {April}, pages = {17-23}, address = {Paris (France)}, author = {C. J. Carmona and P. Gonz{\'a}lez and M. J. del Jesus and F. Herrera} }