Anyika, V. O. ., I. G. . Anikelechi, and T. D. . Thobejane. “The Impact of Covid-19 on Nigerian Education System”. Journal of Intellectual Disability - Diagnosis and Treatment, vol. 9, no. 2, Apr. 2021, pp. 222-7, doi:10.6000/2292-2598.2021.09.02.9.