@article {610, title = {Making CN1 -SD Subgroup Discovery Algorithm Scalable to Large Size Data Sets Using Instance Selection}, journal = {Expert System with Applications}, volume = {35}, number = {4}, year = {2008}, pages = {1949-1965}, author = {J. R. Cano and F. Herrera and Lozano, Manuel and Garc{\'\i}a, Salvador} }