1. Stevens B, Johnston C, Gibbins S (2000) Pain assessment in neonates. In: Anand KJS, Stevens BJ, McGrath PJ (eds) Pain in neonates: 2nd revised and enlarged edition. Elsevier, New York, pp 101-134.
2. Wong D, Baker C (1988) Pain in children: Comparison of assessment scales. Pediatr Nurs 14(1): 9-17.
3. Grunau RE (2000) Long-term consequences of pain in human neonates. In: Anand KJS, Stevens BJ, McGrath PJ (eds) Pain in neonates: 2nd revised and enlarged edition. Elsevier, New York, pp 55-76.
4. Coffman S, Alvarez Y, Pyngolil M, Petit R, Hall C, Smyth M (1997) Nursing assessment and management of pain in critically ill children. Heart Lung 26(3): 221-228.
5. Van Cleve L, Johnson L, Pothier P (1996) Pain responses of hospitalized infants and children to venipuncture and intravenous cannulation. J Pediatr Nurs 11(3): 161-168.