Gu, Xuelin, Bhramar Mukherjee, Sonali Das, and Jyotishka Datta. 2021. “COVID-19 Prediction in South Africa: Estimating the Unascertained Cases - the Hidden Part of the Epidemiological Iceberg”. Journal of Statistical Research 55 (1):267-91. https://banglajol.info/index.php/JStR/article/view/56592.