1. NBJ's Supplement Business Report 2008: An Analysis of Markets, Trends, Competition and Strategy in the U.S. Dietary Supplement Industry. Figure 3–33(Table 1); Figure 4–18,2008
2. The treatment of poliomyelitis and other virus diseases with vitamin C.;FR Klenner;South Med Surg,1949
3. Massive doses of vitamin C and the virus diseases.;FR Klenner;South Med Surg,1951
4. Acute hepatitis treated with high doses of vitamin C. Report of a case.;HB Calleja;Ohio Med,1960
5. Observations on the dose and administration of ascorbic acid when employed beyond the range of a vitamin in human pathology.;FR Klenner;Journal of Applied Nutrition,1971