@article{CGH2008,
author = {J.R. Cano and  S. Garc\'ia and  F. Herrera},
title = {Subgroup Discovery in Large Size Data Sets Preprocessed Using Stratified Instance Selection for Increasing the Presence of Minority Classes},
journal = {Pattern Recognition Letters},
volume = {29},
pages = {2156--2164},
year = {2008}
}