TAFAMEL, Andrew Ehiabhi; AKRAWAH, Onutomaha Dennis. Cost Efficiency of the oil and gas industry in nigeria: Data Envelopment Analysis. Archives of Business Research, [S. l.], v. 3, n. 6, 2015. DOI: 10.14738/abr.36.1656. Disponível em: https://scholarpublishing.org/journals/index.php/ABR/article/view/431. Acesso em: 4 may. 2026.