ANYADIEGWU, C. I. Comprehensive Approach to Oil Well Drilling Cost Estimation. AFRREV STECH: An International Journal of Science and Technology, [S. l.], v. 1, n. 1, p. 174–190, 2014. DOI: 10.4314/stech.v1i1. Disponível em: https://www.ajol.info/index.php/stech/article/view/108066. Acesso em: 12 aug. 2026.