MALLA, U.; MURRAY, N.; VLOK, R.; MELHUISH, T.; BASSON, W.; WHITE, L. Transversus Abdominis Plane Block versus Quadratus Lumborum Block for Postoperative Pain in Abdominal Surgery: A Systematic Review and Meta-analysis. Archives of Anesthesiology and Critical Care, v. 4, n. 4, p. 542-546, 11 set. 2018.