1. Department of Engineering University of Messina Messina Italy
2. Institute for Polymers, Composites and Biomaterials ‐ CNR IPCB Catania Italy
3. Department of Mathematics and Physics"Ennio De Giorgi" CEDAD (CEnter of applied physics, DAting and Diagnostics) Lecce Italy
4. Department of Mathematics and Computer Sciences Physical Sciences and Earth Sciences, MIFT, Università di Messina Messina Italy