Institution: | 1. Nhatrang Educational College, 01 Nguyen Chanh Street, Nhatrang City, Viet Nam;2. Department of Mathematics, University of Architecture of Ho Chi Minh City, 196 Pasteur Street, Dist. 3, Ho Chi Minh City, Viet Nam;3. Department of Mathematics and Computer Science, University of Natural Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Dist. 5, Ho Chi Minh City, Viet Nam |