Affiliation: | 1.Department of Mathematics and Computer Science, Dalat University, Dalat, Vietnam ;2.Deparment of Computer Science, University of Science, Ho Chi Minh City, Vietnam ;3.Vietnam National University, Ho Chi Minh City, Vietnam ;4.School of Humanities and Social Sciences, Harbin Institute of Technology (Shenzhen), Shenzhen, China ;5.Department of Computer Engineering, Sejong University, Seoul, South Korea ; |