Huan, L., Nguyen, D.-M., Pham, H.-A. and Huynh-Tuong, N. (2020) “Authentication in E-learning systems: Challenges and Solutions”, VNUHCM Journal of Engineering and Technology, 3(SI1), pp. SI95-SI101. doi: https://doi.org/10.32508/stdjet.v3iSI1.516.