1. Patterns of fetal lamb regional cerebral blood flow during and after prolonged hypoxia;Ashwal;Pediatr. Res.,1980
2. Researches on Prenatal Life, Vol. 1;Barcroft,1946
3. Bevan, J.A.; Bevan, R.D.; Duckles, S.P. Adrenergic regulation of vascular smooth muscle. In: Handbook of Physiology, Sect. 2: Cardiovascular System, Vol. II: Vascular Smooth Muscle 18:515–566;1981.
4. Cerebrovascular regulation and neonatal brain injury;Del Toro;Pediatr. Neurol.,1991
5. Mount Everest in utero. President's Address;Eastman;Am. J. Obstet. Gynecol.,1954