SANTISTEBAN MORALES, Christian Ronald. Variación porcentual para el análisis del Covid-19. SEARCHING, [S. l.], v. 5, n. 1, p. 07–18, 2023. DOI: 10.46363/searching.v5i1.1. Disponível em: https://revista.uct.edu.pe/index.php/searching/article/view/527. Acesso em: 3 nov. 2026.