Salgado Carneiro Zenha, Paulo, José Francisco Belfort Brito, Mauro Santos, and Poliano Bastos da Cruz. “The Impacts of the COVID-19 Pandemic on the Opening and Closing of Companies and on ICMS Tax Collection in the State of Maranhão from 2019 to 2021”. International Seven Journal of Health Research 3, no. 1 (January 29, 2024): 121–136. Accessed April 18, 2024.