Silva Sampai , R. C. ., T. de P. . Matos, K. C. . Santana Alencar, and R. . . Zavala. “Frequency of Internation by COVID-19 in the Year 2020 in the Regional Hospital of Caacupé”. UMAX Scientific Journal, vol. 1, no. 2, Dec. 2021, pp. 53-59, https://revista.umax.edu.py/index.php/rcumax/article/view/18.