6Mitchen P, Bradbury J. British medical Associstion enters GM - crop affray. Lancet 1999,353(9166) :17691.
7Halford NG, Shewry PR. Genetically modified crop: methodology,benefits, regulation and public concerns. Br Med Bull. 2000,56(1) :62 -73.
8Gaskell G, Bauer MW, Durant J, et al. Worlds apart? The reception of genetically modified foods in Europe and the U. S. Science, 1999,285(5426) :384 -386.
9Macilwain C. US food - safety body hears priests over genetically modified food. Nature 1999,402(6762) :571.
10Godfrey J. Do genetically modified foods affect human health? Lancet 2000 ,355 (9201) :414.