7Patrick,G.F.,Musser,W.N(1997) "Sources of and responses to risk: factor analyses of large-scale US cornbelt farmers" In:Huirne,R.B.M.,Hardaker,J.B.,Dijkhuizen,A.A.(Eds),Risk Management Strategies in Agriculture; State of the Art and Future Perspectives.Mansholt Studies,Vol.No.7.Wageningen gricultural University, Wageningen, pp. 45-53.
8Ola,F.,Gudbrand,L.,Matthias,K.,Valle,P.S.,&Martha,E. (2004).Comparing Risk perceptions and risk management in organic and conventional dairy farming: empirical results from Norway,Working paper 2004-21.
9Projece:The Rese- arch Council of Norway(151264/110).Publisher: Norwegian Agricultural Ec- onomics Research Institute,pp.429-446.
10Harwood,J.,Heifner, R.R.,Perry,J.et.al (1999).Farmers shar- pen tools to confront Business Risks. Economics Research Service/USDA,March.