1. Vandam LD. On the origins of intrathecal anesthesia. Int Anesthesiol Clin 1989; 27: 2–7.
2. Berges PU. Regional anesthesia for obstetrics. Clin Anesth 1969; 2: 141–66.
3. Carter J, Macarthur A. Spinal anaesthesia for Caesarean section. Contemporary Anaesthesia 1994; 4: 11–5.
4. Wudsmith JAW. The history and development of local anaesthesia. In: Wildsmith JAW, Armitage EN (Eds.). Principles and Practice of Regional Anaesthesia, 2nd ed. Edinburgh: Churchill Livingstone, 1993: 1–7.
5. Akamatsu TJ. Advances in obstetric anesthesiology during the period 1960–1970. Clin Anesth 1969; 3: 221–51.