9Gallai N, Salles J, Settele J, et al. Economic valuation of the vulnerability of world agriculture confronted with pollinator decline [ J ]. Ecological Economics, 2009, 68 ( 3 ) : 810 -821.
10Klein A M, Vaissiere B E, Cane J H, et al. Importance of pollinators in changing landscapes for world crops [ J]. Proceedings of the Royal Society, 2007, 274 (1608): 303 -313.
