1. Rio Declaration on Environmental and Development 1992
2. Canadian Public Health Association (CPHA) Animal-to-human transplantation: Should Canada proceed? http://www.cpha.ca/uploads/progs/_/xeno/execsum_e.pdf 2001
3. Xenotransplantation Working Party National Health and Medical Research Council (NHMRC) Animal-to-human transplantation research NHMRC http://www.nhmrc.gov.au/_files_nhmrc/file/health_ethics/human/issues/animal_human_transplantation_how_aust_proceed_e55.pdf 2003
4. National Health Committee's Advice on Living Cell Technologies Application for Xenotransplantation Clinical Trials in New Zealand http://nhc.health.govt.nz/system/files/documents/publications/nhc-living-cell-technologies-report-oct082.pdf 2008