1. Center for Forecasting Study, Institute of Southeast Vietnamese Studies, Thu Dau Mot University, Binh Duong Province, Vietnam
2. Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Apartado Postal 14, Ensenada, Baja California, Código Postal 22800, Mexico
3. Institute of Theoretical and Applied Research, Duy Tan University, Ha Noi 100000, Vietnam
4. Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam