@article{SFBH2011,
author = {J. Sanz and  A. Fern\'andez and  H. Bustince and  F. Herrera},
title = {A Genetic Tuning to Improve the Performance of Fuzzy Rule-Based Classification Systems with Interval-Valued Fuzzy Sets: Degree of Ignorance and Lateral Position},
journal = {International Journal of Approximate Reasoing},
volume = {52},
number = {6},
pages = {751--766},
year = {2011}
}