1. Division of Data Science; Ton Duc Thang University; Ho Chi Minh City Vietnam
2. Faculty of Information Technology; Ton Duc Thang University; Ho Chi Minh City Vietnam
3. Université de Nantes and LS2N UMR CNRS 6004; Nantes France
4. Università di Catania; Catania Italy
5. School of Mathematical Sciences; Universiti Sains Malaysia; Penang Malaysia