1WHO. Mental retardation meeting the challenge. Genava, 1985,1 ~10.
2Blennow M, Hagberg H, Ingvar M, et al. Neurochemical and biophysical assessent of neonatal hypoxic-ischemic encephalopathy.Semin Perinatol, 1994,18:30~ 35.
3Roland EH,Hill A. Intraventricular hemorrhage and posthemorrhagic hydrocephalus. Clin Perinatol, 1997,24: 589~ 605.
4Volpe J J. Brain injury in the premature infant. Clin Perinatol, 1997,24:567~587.