OMARA, Tarek. Robust Liu-Type Estimator for SUR Model. Statistics, Optimization & Information Computing, [S. l.], v. 9, n. 3, p. 607–617, 2021. DOI: 10.19139/soic-2310-5070-985. Disponível em: https://iapress.org/index.php/soic/article/view/985. Acesso em: 7 may. 2026.