Perry, Ek; Pickering, At; Wang, Ww; Houghton, P; Perry, Ns. Medicinal plants and Alzheimer's disease: Integrating ethnobotanical and contemporary scientific evidence. Journal of alternative and complementary medicine (New York, N.Y.). Winter 1998, 4 (4): 419–28. ISSN 1075-5535. PMID 9884179.
Perry, Ek; Pickering, At; Wang, Ww; Houghton, P; Perry, Ns. Medicinal plants and Alzheimer's disease: Integrating ethnobotanical and contemporary scientific evidence. Journal of alternative and complementary medicine (New York, N.Y.). Winter 1998, 4 (4): 419–28. ISSN 1075-5535. PMID 9884179.