7Pettitt R. G,2001, Traceability in the Food Animal Industry and Supermarket Chains, Scientific and Technical Review,20:584 -597.
8Hobbs J. E ,2004 ,Information Asymmetry and the Role of Traceability Systems,Agribusiness, 20:397 -415.
9Golan E, Krissoff B,Kuchler F, Calvin L, Nelson K, Price G,2004,Traceability in the U. S. Food Supply:Economic Theory and Industry Studies.Agricultural Economic report.3 : 1 - 48.
10Rabade, Alfaro,2006, Buyer-Supplier Relationship' s Influence on Traceability Implementation in the Vegetable Industry, Journal of Purchasing and Supply Management, 1:39-50.