1. N. Alwahaibi, M. Al Maskari1, B. Al Dhahli, H. Al Issaei and S. Al Bahlani, “A review of the prevalence of COVID-19 in the Arab world ‘. The journal of infection developing countries, Vol. 14, No.11, pp:1238-1245, 2020.
2. Harrell, F. E. "Regression modeling strategies: With applications to linear models, logistic regression, and survival analysis," Springer-Verlag, New York, 2001.
3. Hinshaw D, McKay B (26 February 2021). "In Hunt for Covid-19 Origin, Patient Zero Points to Second Wuhan Market – The man with the first confirmed infection of the new coronavirus told the Who team that his parents had shopped there". The Wall Street Journal. Retrieved 27 February 2021.
4. H. S. Alkutubi , N. Akma, and N. K. Yaseen, “On Statistical Analysis of Cancer Tumors in Tikrit Hospital”. European Journal of Scientific Research, Vol.35, No.1, pp 106-120. 2009.
5. H. S. Alkutubi, “On Randomized Complete Block Design” . International Journal of Sciences: Basic and Applied Research (IJSBAR), Vol. 53, No 2, pp 230-243. 2020.