Parras, T., Blanco, R. Randomised trial comparing the transversus abdominis plane block posterior approach or quadratus lumborum block type I with femoral block for postoperative analgesia in femoral neck fracture, both ultrasound-guided. Revista Espanola de Anestesiologia y Reanimacion 2016; 3: 141-8

PubMed ID: PM:26302669