1. University of Tuscia,Dept. of Economics, Engineering, Society and Business Organization (DEIM),Viterbo,Italy
2. University of Córdoba,Computing and Numerical Analysis,Córdoba,Spain
3. University of Córdoba,Nursing, Physiotherapy and Pharmacology,Córdoba,Spain
4. University of Córdoba,Dept. Physical Chemistry and Applied Thermodynamics,Córdoba,Spain