1. a Department of Mechanical Engineering, Polytechnic University of Valencia, 46022 Valencia, Spain
2. b Department of Mechanical Engineering, Polytechnic University of Valencia, 46022 Valencia, Spain
3. c Department of Mechanical Engineering, Polytechnic University of Valencia, 46022 Valencia, Spain
4. d Department of Industrial Engineering, University of Cassino, 03043 Cassino (Fr), Italy