1. Patient-controlled analgesia: an overview;Owen,1992
2. Objective measures of pain and pain relief following cardiovascular surgery;Sechzer;Rev Argentina Angiolg,1967
3. Studies in pain with the analgesic-demand system;Sechzer;Anesth Analg,1971
4. Laboratory evaluation of the Baxter patient-controlled analgesia infusor system: A disposable patient-controlled analgesia device;Mackey;Anesth Analg,1993
5. Laboratory evaluation of the Gomedical PCI: A disposable patient-controlled analgesia device;Mackey;Anaesth Int Care,1993