Ng, P. T., Dung, V., Nguyet, L. M., Linh, V. T. K., Thuy, H. T. and Tinh, N. T. (2020) “Academic Anxiety of Vietnamese Secondary School Students as a Reason for Applying Online Learning”, Journal of Intellectual Disability - Diagnosis and Treatment, 8(4), pp. 730–739. doi: 10.6000/2292-2598.2020.08.04.16.