Cristian Munteanu Agostinho C. Rosa Symmetry at the Genotypic Level and the Simple Inversion Operator. 209-222 2007 conf/epia/2007w EPIA Workshops http://dx.doi.org/10.1007/978-3-540-77002-2_18 db/conf/epia/epia2007w.html#MunteanuR07