Bach, Peter B.; Lewis, Roger J. (14 November 2012). "Multiplicities in the Assessment of Multiple Vitamins Is It Too Soon to Tell Men That Vitamins Prevent Cancer?". The Journal of the American Medical Association. 308 (18): 1916–1917. doi:10.1001/jama.2012.53273. PMID23150011.
Bach, Peter B.; Lewis, Roger J. (14 November 2012). "Multiplicities in the Assessment of Multiple Vitamins Is It Too Soon to Tell Men That Vitamins Prevent Cancer?". The Journal of the American Medical Association. 308 (18): 1916–1917. doi:10.1001/jama.2012.53273. PMID23150011.