1. The Department of Homeland Security's Role in Food Defense and Critical Infrastructure Protection, Department of Homeland Security, Office of Inspector General, February 2007, OIG-07-33, Available from: http://www.dhs.gov/xoig/assets/mgmtrpts/OIG_07-33_Feb07.pdf.
2. Risk and vulnerability assessment by the Swedish National Food Agency (Risk- och sårbarhetsanalys samt förmågebedömning inom Livsmedelsverkets ansvarsområde), National Food Agency, Sweden, November 2010, Dnr: 1250/2010, Saknr: 10 (in Swedish).
3. A. El Amin, Unipektin issues recall over additive concerns, Food Production daily.com., 31-July-2007, Available from: http://www.foodproductiondaily.com/Quality-Safety/Unipektin-issues-recall-over-additive-concerns.
4. M.R. Subramani, Agri-Business guar gum exports to Europe come to a standstill, The Hindu Business Line, August 27, 2007, Available from: http://www.thehindubusinessline.in/bline/2007/08/27/stories/2007082750300500.htm.
5. S. Mishra, India guar gum exports up on industry demand, Reuters.com, Apr 28, 2008, Available from: http://in.reuters.com/article/2008/04/28/idINIndia-33275620080428.