1. CIDESD; Department of Engineering; University of Trás-os-Montes e Alto Douro (UTAD); 5001-801 Vila Real Portugal
2. Department of Systems and Control; Jožef Stefan Institute; Jamova cesta 39 SI-1000 Ljubljana Slovenia
3. CITAB; Department of Engineering; University of Trás-os-Montes e Alto Douro (UTAD); 5001-801 Vila Real Portugal