Abdeen, Mohammad A. R., Tarek R. Sheltami, and Ibrahim A. Nemer. “An Approximate Analytical Formula for Estimating the Weight of Factors Affecting the Spread of COVID-19: A Case Study of the First Wave”. Revista do Instituto de Medicina Tropical de São Paulo 63 (June 30, 2021): e45. Accessed May 4, 2024. https://www.revistas.usp.br/rimtsp/article/view/187964.