Ladizesky, M., Lu, Z., Oliveri, B., San Roman, N., Diaz, S., Holick, M.F., et al. (1995) Solar ultraviolet B radiation and photoproduction of vitamin D3 in central and southern areas of Argentina. Journal of bone and mineral research: The Official Journal of the American Society for Bone and Mineral Research, 10, 545-549. http://dx.doi.org/10.1002/jbmr.5650100406
 Holick, M.F. (1981) The cutaneous photosynthesis of previtamin D3: A unique photoendocrine system. Journal of Investigative Dermatology, 77, 51-58. http://dx.doi.org/10.1111/1523-1747.ep12479237
 Webb, A.R., Kline, L. and Holick, M.F. (1988) Influence of season and latitude on the cutaneous synthesis of vitamin D3 synthesis in human skin. The Journal of Clinical Endocrinology & Metabolism, 67, 373-378. http://dx.doi.org/10.1210/jcem-67-2-373
 Oliveri, M.B., Ladizesky, M., Mautalen, C.A., Alonso, A. and Martinez, L. (1993) Seasonal variations of 25 hydroxyvitamin D and parathyroid hormone in Ushuaia (Argentina), the southernmost city of the world. Bone Miner, 20, 99-108. http://dx.doi.org/10.1016/S0169-6009(08)80041-4
 Porojnicu, A.C., Lagunova, Z., Robsahm, T.E., Berg, J.P., Dahlback, A. and Moan, J. (2007) Changes in risk of death from breast cancer with season and latitude: Sun exposure and breast cancer survival in Norway. Breast Cancer Research and Treatment, 102, 323-328. http://dx.doi.org/10.1007/s10549-006-9331-8
 Basile, L.A., Taylor, S.N., Wagner, C.L., Quinones, L. and Hollis, B.W. (2007) Neonatal vitamin D status at birth at latitude 32 degrees 72': Evidence of deficiency. Journal of Perinatology, 27, 568-571. http://dx.doi.org/10.1038/sj.jp.7211796
 Hamilton, S.A., McNeil, R., Hollis, B.W., Davis, D.J., Winkler, J., Cook, C., et al. (2010) Profound vitamin D deficiency in a diverse group of women during pregnancy living in a sun-rich environment at latitude 32 degrees N. International Journal of Endocrinology, 917428.
 Johnson, D.D., Wagner, C.L., Hulsey, T.C., McNeil, R.B., Ebeling, M. and Hollis, B.W. (2010) Vitamin D deficiency and insufficiency is common during pregnancy. American Journal of Perinatology, 28, 7-12. http://dx.doi.org/10.1055/s-0030-1262505
 Wagner, C.L. and Greer, F.R. (2008) Prevention of rickets and vitamin D deficiency in infants, children, and adolescents. Pediatrics, 122, 1142-1152. http://dx.doi.org/10.1542/peds.2008-1862
 Wagner, C.L., Hulsey, T.C., Fanning, D., Ebeling, M. and Hollis, B.W. (2006) High-dose vitamin D3 supplementation in a cohort of breastfeeding mothers and their infants: A 6-month follow-up pilot study. Breastfeed Medicine, 1, 59-70. http://dx.doi.org/10.1089/bfm.2006.1.59
 Hollis, B.W. and Wagner, C.L. (2004) Assessment of dietary vitamin D requirements during pregnancy and lactation. The American Journal of Clinical Nutrition, 79, 717 -726.
 Hollis, B.W. and Wagner, C.L. (2011) The vitamin D requirement during human lactation: The facts and IOM’s “utter” failure. Public Health Nutrition, 14, 748-749. http://dx.doi.org/10.1017/S1368980011000309
 Hollis, B.W., Johnson, D., Hulsey, T.C., Ebeling, M. and Wagner, C.L. (2011) Vitamin D supplementation during pregnancy: Double-blind, randomized clinical trial of safety and effectiveness. Journal of Bone and Mineral Research: The Official Journal of the American Society for Bone and Mineral Research, 26, 2341-2357. http://dx.doi.org/10.1002/jbmr.463
 Greer, F.R., Hollis, B.W., Cripps, D.J. and Tsang, R.C. (1984) Effects of maternal ultraviolet B irradiation on vitamin D content of human milk. Journal of Pediatrics, 105, 431-433.http://dx.doi.org/10.1016/S0022-3476(84)80021-9
 Greer, F.R., Hollis, B.W. and Napoli, J.L. (1984) High concentrations of vitamin D2 in human milk associated with pharmacologic doses of vitamin D2. Journal of Pediatrics, 105, 61-64. http://dx.doi.org/10.1016/S0022-3476(84)80361-3
 Hollis, B. and Wagner, C. (2004) Vitamin D requirements during lactation: High-dose maternal supplementation as therapy to prevent hypovitaminosis D in both mother and nursing infant. The American Journal of Clinical Nutrition, S80, 1752-1758.
 Gartner, L. and Greer, F. (2003) American academy of pediatrics. Section on breastfeeding medicine and committee on nutrition. Prevention of rickets and vitamin D deficiency: New guidelines for vitamin D intake. Pediatrics, 111, 908-910. http://dx.doi.org/10.1542/peds.111.4.908
 Labbok, M.H. and Krasovec, K. (1990) Toward consistency in breastfeeding definitions. Studies in Family Planning, 21, 226-230. http://dx.doi.org/10.2307/1966617
 Coffin, C.F., Labbok, M.H. and Belsey, M. (1997) Breastfeeding definitions. Contraception, 55, 323-325.http://dx.doi.org/10.1016/S0010-7824(97)00039-5
 Hollis, B.W., Kamerud, J.Q., Selvaag, S.R. and Lorenz, J.D. (1993) Determination of vitamin D status by radioimmunoassay with a 125I-labeled tracer. Clinical Chemistry, 39, 529-533.
 Laboratories, M.C. (2004) Laboratory reference data. Mayo Clinic, Rochester.
 Hollis, B.W. and Wagner, C.L. (2005) Normal serum vitamin D levels. The New England Journal of Medicine, 352, 515-516. http://dx.doi.org/10.1056/NEJM200502033520521
 Hollis, B. (2005) Circulating 25-hydroxyvitamin D levels indicative of vitamin D sufficiency: Implications for establishing a new effective dietary intake recommendation for vitamin D. The Journal of Nutrition, 135, 317-322.
 Vieth, R., Ladak, Y. and Walfish, P. (2003) Age-related changes in the 25-hydroxyvitamin D versus parathyroid hormone relationship suggest a different reason why older adults require more vitamin D. The Journal of Clinical Endocrinology & Metabolism, 88, 185-191.
 Food and Nutrition Board (2010) Standing Committee on the scientific evaluation of dietary reference intakes. Dietary reference intakes for vitamin D and calcium. National Academy Press, Washington DC.
 Shaikh, U. and Alpert, P. (2004) Practices of vitamin D recommendation in Las Vegas, Nevada. Journal of Medical Microbiology, 20, 56-61.http://dx.doi.org/10.1177/0890334403260617