1. Department of Engineering; University of Trás-os-Montes e Alto Douro; P-5001-801 Vila Real Portugal
2. Department of Engineering/CITAB; University of Trás-os-Montes e Alto Douro; P-5001-801 Vila Real Portugal
3. Department of Engineering/IEETA; University of Trás-os-Montes e Alto Douro; P-5001-801 Vila Real Portugal