Effects of Multicollinearity and Correlation between the Error Terms on Some Estimators in a System of Regression Equations. Global Journal of Science Frontier Research, [S. l.], v. 20, n. F4, p. 77–94, 2020. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/2729. Acesso em: 9 apr. 2026.