Veiga, C. R. P. da, C. P. da Veiga, and Z. Su. “Supplementary Health System in Brazil: Business Model Not Threatened by Socioeconomic Crisis”. International Journal of Professional Business Review, vol. 8, no. 1, Jan. 2023, p. e01225, doi:10.26668/businessreview/2023.v8i1.1225.