Gu, Xuelin, Bhramar Mukherjee, Sonali Das, and Jyotishka Datta. “COVID-19 Prediction in South Africa: Estimating the Unascertained Cases - the Hidden Part of the Epidemiological Iceberg”. Journal of Statistical Research 55, no. 1 (December 9, 2021): 267–291. Accessed June 26, 2022. https://banglajol.info/index.php/JStR/article/view/56592.