1. Davies F, Gladstone RJ, Stibbe EP. The anatomy of the intercostal nerves. J Anat 1931; 66: 323–33.
2. Hebbard P, Fujiwara Y, Shibata Y, Royse C. Ultrasound-guided transversus abdominis plane (TAP) block. Anaesth Intensive Care 2007; 35: 616–7.
3. Sakamoto H, Akita K, Sato T. An anatomical analysis of the relationships between the intercostal nerves and the thoracic and abdominal muscles in man. I. Ramification of the intercostal nerves. Acta Anat (Basel) 1996; 156: 132–42.
4. Jamieson RW, Swigart L, Anson BJ. Points of parietal perforation of the ilioinguinal and ilio-hypogastric nerves in relation to optimal sites for local anaesthesia. Q Bull Northwest Univ Med Sch. 1952; 26: 22–6.