KIKAWA, C. R.; KLOPPERS, P. H. Multiple linear regression with constrained coefficients: Application of the lagrange multiplier. South African Statistical Journal, [S. l.], v. 50, n. 2, p. 303–312, 2016. DOI: 10.37920/sasj.2016.50.2.8. Disponível em: https://www.journals.ac.za/index.php/sasj/article/view/5259. Acesso em: 3 apr. 2026.