1. Hulten K, Van Kappel AL, Winkvist A, Kaaks R, Hallmans G, Lenner P, and Riboli E. Carotenoids, alpha-tocopherols, and retinol in plasma and breast cancer risk in northern Sweden. Cancer Causes Control 12: 529-537., 2001.

2. Toniolo P, Van Kappel AL, Akhmedkhanov A, Ferrari P, Kato I, Shore RE, and Riboli E. Serum carotenoids and breast cancer. Am J Epidemiol 153: 1142-1147., 2001.

3. Kim MK, Ahn SH, and Lee-Kim YC. Relationship of serum alphatocopherol, carotenoids and retinol with the risk of breast cancer. Nutrition Research 21: 797-809, 2001.

4. Zhang S, Hunter DJ, Forman MR, Rosner BA, Speizer FE, Colditz GA, Manson JE, Hankinson SE, and Willett WC. Dietary carotenoids and vitamins A, C, and E and risk of breast cancer. J Natl Cancer Inst 91: 547-556., 1999.

5. Rock CL, Saxe GA, Ruffin MTt, August DA, and Schottenfeld D. Carotenoids, vitamin A, and estrogen receptor status in breast cancer. Nutr Cancer 25: 281-296, 1996.

6. Milo K, Singeltary J, Bomser J, and Smith MAL. Lutein and zeaxanthin inhibit human breast cancer cell proliferation (abstract). FASEB 12: A830, 1998.

7. Yeum, K. J., G. Ferland, et al. (1998). "Relationship of plasma carotenoids, retinol and tocopherols in mothers and newborn infants." J Am Coll Nutr 17(5): 442-7.