DE FRANÇA, J. A.; CARVALHO, N. A.; PEREIRA, C. C.; VIEIRA, E. T. . The Operational Sustainability of the Firm : The operational performance versus financial solvency binomial - OPFS . International Journal for Innovation Education and Research, Dhaka, Bangladesh, v. 9, n. 1, p. 353–370, 2021. DOI: 10.31686/ijier.vol9.iss1.2909. Disponível em: https://www.ijier.net/ijier/article/view/2909. Acesso em: 19 apr. 2021.