1. Winnie AP, Ramamurthy S, Durrani Z, Radonjic R. Plexus blocks for lower extremity surgery, Anesthesiology Review 1974; 1: 11–6.
2. Chayen D, Nathan H, Chayen M. The psoas compartment block. Anesthesiology 1976: 45: 95–9.
3. Parkinson SK, Mueller JB, Little WL, Bailey SL. Extent of blockade with various approaches to the lumbar plexus. Anesth Anaig 1989; 68: 243–8.
4. Winnie AP. Regional anaesthesia for the extremities. ASA Refresher Course Lectures 1985; 254: 1–5.
5. Bruce BD, Lee E, Croitoru M. Psoas block for surgical repair of hip fracture: a case report and description of a catheter technique. Anesth Analg 1990; 71: 298–301.