public double[][] getReferenceSet() {
   openga.applications.data.parallelMachine data1 = new openga.applications.data.parallelMachine();
   if (numberOfJob == 35) {
     return data1.getParetoJob35M10();
   } else if (numberOfJob == 50) {
     return data1.getParetoJob50M15();
   } else { // for job = 65
     return data1.getParetoJob65M18();
   }
 }