Bruno Apolloni Andrea Brega Dario Malchiodi Christos Orovas Anna Maria Zanaboni A Fuzzy Method for Learning Simple Boolean Formulas from Examples. 367-381 2005 Computational Intelligence for Modelling and Prediction http://dx.doi.org/10.1007/10966518_26 series/sci/2005-2 db/series/sci/sci2.html#ApolloniBMOZ05