5Wemer, Pevetz. The acceptance of the machinery circle by part-time farmers in Austria [ J ]. Monatsberichte Ueber Die Oesterreichische Landwirts Chaft, 1997, 44( 6 ) : 395 - 400.
6Mei Ying Huang, Cliff J Huang, Tsu - Tan Fu. Cultivation arrangement and the cost efficient of rice farming in taiwan [J]. Journal of Productivity Analysis, 2002, 18 ( 3 ) : 223 -239.
