@conference {simidat199, title = {Addressing Data-Complexity for Imbalanced Data-sets: A Preliminary Study on the Use of Preprocessing for C4.5}, booktitle = {9th International Conference on Intelligent Systems Designs and Applications (ISDA)}, year = {2009}, pages = {523-528}, author = {J. Luengo and A. Fern{\'a}ndez and F. Herrera and S. Garc{\'\i}a} }