OKIAKPE, Ebikefe Kenneth, Ngbomowa Moses JONAH, and CHINDA Godstime Nyema. “OPERATIONAL COST CONTROL AND PROFITABILITY OF UPSTREAM OIL AND GAS FIRMS IN NIGERIA”. Journal of Accounting Information and Innovation 11, no. 2 (February 23, 2026): 1–11. Accessed April 16, 2026. http://cirdjournals.com/index.php/jaii/article/view/1477.