1. Effects of adrenaline, an alpha-2 receptor agonist, the volume of injection and the global pain state of the animal on the activity of epidural sufentanil;Meert;Acta Anaeslhiol Belg,1989
2. Effect of diluent volume on analgesia produced by epidural fentanyl;Birnbach;Anesth Anatg,1989
3. Absorption of epidural morphine;Scheinin;Anaesthesia,1986
4. Effect of diluent volume on analgesia produced by epidural fentanyl;Arcario;Anesthesiology,1987