1. Danford DE, Munro HN (1980) Water-soluble vitamins. In: (Gilman AG, Goodman LS, Gilman A eds.) The pharmacological basis of therapeutics, 6th edn Macmillan Publishing, New York
2. Holland HC (1969) The spiral after effect. Pergamon, London
3. Pauling L (1970) Vitamin C and the common cold. W. H. Freeman, San Francisco
4. Pfeiffer CC, Goldstein L, Murphree HB, Nicols RC (1968) A critical survey of possible biochemical stimulants. In: (Efron DH ed) Psychopharmacology. a review of progress. Department of Health, Education and Welfare, Washington, DC
5. Webster J (1971) Vitamin C. The protective vitamin. Award Books, New York