Olujobi, O. J.; Irumekhai, O. S.; Olujobi, O. M.; Aina-Pelemo, A. D.; Olipede, D. E. Challenges Militating Against Indigenous Oil Companies Operating in Nigeria’s Upstream Petroleum Industry: Strategies and Panaceas for Their Sustainability. JSDLP 2024, 15 (3), 145-176.