1. Vitamin A Deficiency: Case Report;Cornfeld;Pediatrics,1952
2. Vitamin A Deficiency in Infants: Clinical and Pathological Study;Blackfan;J. Pediat.,1933
3. Lewis, Jacques M.: Deficiency of VitaminA in Holt and McIntosh's Pediatrics, ed. 12, New York, Appleton-Century-Crofts, p. 286.
4. Clinical Nutrition;Clausen,1950
5. Pathological Changes in Acute and Protracted Vitamin A Deficiency;Stoerk;Arch. Path.,1952