4Verhaegen, G. Van Huylenbroeck. Costs and benefits for farmers participating in innovative marketing channels for quality food products Journal of Rural Studies (2001) ,pp. 17 443 -456.
5Coase, R. H. "The Nature of the Firm". Economica, 1937,4 : 386 - 405.
6Coase, R. H. "The Problem of Social Cost", Journal of Law and Economies. 1960,3 : 1 - 44.
7WiUiamson,O. E. Mrakets and Hierarchies:Analysis and Antitrust Implications. New York:Free Press. 1975.
8Cheung, S. N. S. "The Contractual Nature of the Firm. "Journal of Law and Economics. 1983,26:1 -22.
9Williamson, O. E. The Economic Institutions of Capitalism. New York:Free Press. 1985.
10Hobbs ,J. E : Measuring the Importance of Transaction Costs in Cattle Marketing, American Journal of Agricultural Ecoaomics, Vol. 79, No. 4,1997.
