1. Crisp P (1995). Radish. In: Smartt J, Simmonds NW (eds.), Evolution of Crop Plants, 2nd edn., Longman Group UK, Harlow, UK pp. 86–89.
2. Chinese Agricultural Press (2000). (ed.) Ministry of Agriculture of the Peoples Republic of China.
3. Annual Agricultural Reports of Korea (1998).
4. Japanese Governmental Figures Report (2000).
5. Watt JM and Breyer-Brandwijk MG (1962). In: The Medicinal and Poisonous Plants of Southern and Eastern Africa, 2nd edn., E. & S. Livingstone, Edinburgh and London.