Russo MW, Murray SC, Wurzelmann JI, Woosley JT, Sandler RS (1997). "Plasma selenium levels and the risk of colorectal adenomas". Nutrition and Cancer 28 (2): 125–9. doi:10.1080/01635589709514563. PMID9290116.
Burguera JL, Burguera M, Gallignani M, Alarcón OM, Burguera JA (1990). "Blood serum selenium in the province of Mérida, Venezuela, related to sex, cancer incidence and soil selenium content" (Free full text). Journal of Trace Elements and Electrolytes in Health and Disease 4 (2): 73–7. PMID2136228.
Clark LC, Combs GF, Turnbull BW, et al. (1996). "Effects of selenium supplementation for cancer prevention in patients with carcinoma of the skin. A randomized controlled trial. Nutritional Prevention of Cancer Study Group". JAMA 276 (24): 1957–63. doi:10.1001/jama.276.24.1957. PMID8971064.
Lippman SM, Klein EA, Goodman PJ, et al. (2009). "Effect of selenium and vitamin E on risk of prostate cancer and other cancers: the Selenium and Vitamin E Cancer Prevention Trial (SELECT)" (Free full text). JAMA 301 (1): 39–51. doi:10.1001/jama.2008.864. PMID19066370.
Garland M, Morris JS, Stampfer MJ, et al. (1995). "Prospective study of toenail selenium levels and cancer among women". Journal of the National Cancer Institute 87 (7): 497–505. doi:10.1093/jnci/87.7.497. PMID7707436.
Hercberg S, Galan P, Preziosi P, et al. (2004). "The SU.VI.MAX Study: a randomized, placebo-controlled trial of the health effects of antioxidant vitamins and minerals" (Free full text). Archives of Internal Medicine 164 (21): 2335–42. doi:10.1001/archinte.164.21.2335. PMID15557412.
Klein EA (2009). "Selenium and vitamin E: interesting biology and dashed hope". Journal of the National Cancer Institute 101 (5): 283–5. doi:10.1093/jnci/djp009. PMID19244172.