Tong Thi Hao Tam, Pham Thao, Ha Lam Tung, Cao Thi Thu Huong, Tong Thi Minh Ngoc, and Pham Minh Hoan. “RESEARCH AND APPLY AUTOMATIC SENDING MESSAGE SYSTEM GCM ON THE INTERNAL INFORMATION WEBSITE OF NATIONAL ECONOMICS UNIVERSITY”. UTEHY Journal of Applied Science and Technology 15 (October 11, 2017): 76-81. Accessed December 22, 2024. http://tapchi.utehy.edu.vn/index.php/jst/article/view/167.