OKIAKPE, Ebikefe Kenneth, Ngbomowa Moses JONAH, and CHINDA Godstime Nyema. 2026. “OPERATIONAL COST CONTROL AND PROFITABILITY OF UPSTREAM OIL AND GAS FIRMS IN NIGERIA”. Journal of Accounting Information and Innovation 11 (2):1-11. http://cirdjournals.com/index.php/jaii/article/view/1477.