Jorge Casillas Francisco Herrera R. Pérez María José del Jesús Pedro Villar Special Issue on Genetic Fuzzy Systems and the Interpretability-Accuracy Trade-off. 1-3 2007 44 Int. J. Approx. Reasoning 1 http://dx.doi.org/10.1016/j.ijar.2006.06.002 db/journals/ijar/ijar44.html#CasillasHPJV07