E. Mariano, B. . Torres, M. Almeida, D. Ferraz, D. Rebelatto, and J. C. Soares de Mello, “Brazilian states in the context of COVID-19 pandemic: an index proposition using Network Data Envelopment Analysis”, IEEE LAT AM T, vol. 19, no. 6, pp. 917–924, Jun. 2021.