1. Council Directive 2000/29/EC of 8 May 2000 on protective measures against the introduction into the Community of organisms harmful to plants or plant products and against their spread within the Community;EU;Official Journal of the European Communities,2000
2. FAO 1997 International Plant Protection Convention FAO
3. IPPC 1993 Principles of plant quarantine as related to international trade FAO
4. IPPC 2002 Glossary of phytosanitary terms FAO