1. Department of Information and Telecommunications EngineeringUniversity of BolognaViale Risorgimento, 240136BolognaItaly
2. Computational Optics Research GroupTon Duc Thang UniversityHo Chi Minh CityVietnam
3. Faculty of Applied SciencesTon Duc Thang UniversityHo Chi Minh CityVietnam
4. Dipartimento Di MatematicaUniversità Di BolognaBolognaItaly