5RODRIGUEZ-ARCOS R C, SMITH A C,WALDRON K W. Mechanical properties of greenasparagus[J]. Journal of the Science of Food and Agriculture,2002,82:293 -300.
6KAUFMANN M R. Extensibility of pericarp tissue in growing citrus fruits[J]. Plant Physiology,1970,46(6) :778 -781.
7GYASI S R, FRIEDLY B, CHEN P. Elastic and viscoelastic poisson's ratio determination for selected citrus fruits[J]. Transactions of the ASAE,1981,24(3) :747- 750.
8WILLIAM M M. Physical properties data for postharvest han- dling of florida citrus[J]. Applied Engineerling in Agriculture, 1987,3(1):123 -128.
9CONLAN T M, MILES J A, STEINKE W E. Static lower back stress analysis in citrus harvesting[J]. Transactions of the ASAE,1995,38(3) :929- 936.
10KRISHNA K, SINGH B,SREEN1VASULA R. Post-harvest physico-mechanical properties of orange peel and fruit [J]. Journal of Food Engineering, 2006,73 : 112-120.