Esekpa, Ofem Ibor, et al. “Assessing Labour Inefficiency: Preliminary Results for Human Capital Development Initiative Exploration and Production in Cross River State, Nigeria”. International Journal of Public Management and Social Science Research (IJPMSSR), vol. 1, no. 4, Sept. 2025, pp. 46-61, https://transglobalpunet.com/index.php/ijpmssr/article/view/68.