The effects of ascorbic acid and flavonoids on the occurrence of symptoms normally associated with the common cold
American Journal of Clinical Nutrition (1979) - Comments
pubmed: 463806  doi: 10.1093/ajcn/32.8.1686  issn: 0002-9165  issn: 1938-3207 

I M Baird, R E Hughes, H K Wilson, J E W Davies, A N Howard