G. Ihuoma Lilian and Barifaa Naakorobee, “Enhanced Covid-19 Contact-Tracing System”, IJC, vol. 49, no. 1, pp. 138–151, Nov. 2023, Accessed: Sep. 11, 2025. [Online]. Available: https://www.ijcjournal.org/InternationalJournalOfComputer/article/view/2143