1. Departamento de Ingeniería Mecánica y MineraUniversity of Jaén Jaén Spain
2. Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE)University of Coimbra Coimbra Portugal
3. School of EngineeringUniversity of Plymouth Plymouth UK
4. Department of Mechanical EngineeringNelson Mandela Metropolitan University Port Elisabeth South Africa