J. . Bezerra, F. H. M. . Fernandes, R. de S. . Nascimento, N. L. . Dias, and J. Bezerra, “The First year of the SARS-CoV-2 pandemic in Maringá-PR : real-time surveillance and evaluation with a second derivative model”, Sigmae, vol. 12, no. 3, pp. 51–59, Dec. 2023.