OGUNDELE, F. O.; OKORUWA, V. O. Comparative analysis of technical efficiency between traditional and improved rice variety farmers in Nigeria. African Journal of Economic Policy, [S. l.], v. 11, n. 1, p. 91–108, 2006. DOI: 10.4314/ajep.v11i1.24261. Disponível em: https://www.ajol.info/index.php/ajep/article/view/24261. Acesso em: 6 oct. 2026.