1. Saddle block anesthesia;Adriani;American Journal of Surgery,1946
2. Complications following spinal anaesthesia;Arner;Acta Chirurgica Scandinavica (Supplement),1952
3. Prevention of the postpartum spinal headache;Beck;American Journal of Obstetrics and Gynecology,1973
4. Principles and Practice of Obstetric Analgesia and Anesthesia;Bonica,1967
5. The use of vasoconstrictors to prolong spinal anesthesia;Bonica;Anesthesiology,1951