1. University of Lyon, ENISE, LTDS, UMR 5513 CNRS, Saint-Etienne, France;
2. Federal Mogul Powertrain Ignition Products SAS, Chazelles sur Lyon, France;
3. Mines Saint-Etienne, University of Lyon, CNRS, UMR 5307 LGF, Centre SMS, Saint-Etienne, France