OKIAKPE, E. K.; JONAH , N. M.; GODSTIME NYEMA, C. OPERATIONAL COST CONTROL AND PROFITABILITY OF UPSTREAM OIL AND GAS FIRMS IN NIGERIA. Journal of Accounting Information and Innovation, [S. l.], v. 11, n. 2, p. 1–11, 2026. Disponível em: http://cirdjournals.com/index.php/jaii/article/view/1477. Acesso em: 16 apr. 2026.