1. Hill AF. Economic Botany. A textbook of useful plants and plant products. 2nd ed. New York: McGarw‒Hill Book Company Inc; 1952.
2. Shanidar IV, a Neanderthal flower burial in northern Iraq;Solecki;Science,1975
3. Lanfranco G. Popular use of medicinal plants in the Maltese Islands. Insula.1992;1:34‒35.
4. Farnsworth NR, Akerele O, Bingel AS, et al. Medicinal plants in therapy. Bull World Health Organ. 1985;63(6):965‒981.
5. Can an apple a day keeps the doctor away;Raskin;Curr Pharm Des,2004