5FAO.The Rome declaration on world food security and world food summit plan of action[EB/OL].[1996-11-17] http://www.fao.org/docrep/003/w3613e/w3613e00.htm.
6STRINGER R.Food security in developing countries[EB/OL].[2000-08-23] http://papers.ssrn.com/sol3/papers.cfm? abstract_id =231211.
