1. Lemkow L. Public attitudes to genetic engineering: Some European perspectives. Luxembourg: Office of Official Publications of the European Communities; 1993.
2. TIME/CNN Poll. TIME 2001 Feb. 26. p. 45.
3. Thiele. Moral problems in the patenting of human genes. Europäische Akadamie Newsletter 2000; 21: 1-3.
4. Campbell KHS, McWhir J, Ritchie WA, Wilmut I. Sheep cloned by nuclear transfer from a cultured cell line. Nature 1997; 385:810-813.
5. Beauchamp TL. Suicide. In: Regan T, editor. Matters of Life and Death. USA:McGraw-Hill Inc.