1. Cobalt: Its Role in Health and Disease
2. Wald, I.; Członkowska, A.; Dowżenko A. Clinical Neurology, Warsaw: National Institute of Medical Publications, 1987, 451 p. (in Polish)
3. Morris, M.C.; Evans, D.A.; Schneider, J.A.; Tangney, C.C.; Bienias, J.L.; Aggarwal, N.T. Dietary folate and vitamins B-12 and B-6 not associated with incident Alzheimer’s disease Journal of Alzheimer’s Disease, 2006, 9, pp. 435–443
4. Siuda, J.; Gorzkowska, A.; Patalong-Ogiewa, M.; Krzystanek, E.; Czech, E.; Wiechuła, B.; Garczorz, W.; Danch, A.; Jasińska-Myga, B.; Opala, G. From mild cognitive impairment to Alzheimer’s disease - influence of homocysteine, vitamin B12 and folate on cognition over time: results from one-year follow-up. Polish Journal of Neurology and Neurosurgery, 2009, 43(4), pp. 321–329. (in Polish)
5. Kivipelto, M.; Annerbo, S.; Hultdin, J.; Bäckman, L.; Viitanen, M.; Fratiglioni, L.; Lökk, J. Homocysteine and holo-transcobalamin and the risk of dementia and Alzheimers disease: a prospective study. European Journal of Neurology, 2009, 16, pp. 808–813