[1] UMBERGER W,THILMANY McFadden D,SMITH A. Does altruism play a role in determining U.S. consumer preferences and willingness to pay for natural and regionally produced beef? [J]. Agribusiness,2009,25 (2),269-285.
[2] WEATHERALL C,TREGEAR A,ALLINSON J. In search of the concerned consumer:UK public perception of food,farming and buying local[J]. Journal of Rural Studies,2003,19(2),233- 233.
[3] VERMEIR I,VERBEKE W. Sustainable food consumption am- ong young adults in Belgium:Theory of planned behavior and the role of confidence and values[J]. Ecological Economics,2008,(64):542-553.
[4] WANG Kaibo,SHANGGUAN Zhouping. Simulating the vegetation-producing process in small watersheds in the Loess Plateau of China[J]. Journal of Arid Land,2012,4(3):300-309.
[5] GAMOUN Mouldi. Grazing intensity effects on the vegetation in desert rangelands of Southern Tunisia[J]. Journal of Arid Land,2014,6(3):324-333.
[6] VOLONOVA Marina,ZHANG Yuanming. Alien invasive species in Siberia:current status and problem[J]. Journal of Arid Land,2013,5(4):428-433.