THE ACCURACY OF SCHEFFE’S THIRD DEGREE OVER SECOND-DEGREE, OPTIMIZATION REGRESSION POLYNOMIALS. Nigerian Journal of Technology, [S. l.], v. 25, n. 2, p. 5–15, 2006. DOI: 10.4314/njt.252.531. Disponível em: https://nijotech.com/index.php/nijotech/article/view/531. Acesso em: 16 apr. 2026.