7Heerde, Helsen and Dekimpe. " Managing Product Harm Ctisis" [ D]. Erasmus Research Institute of Management. 2006:12 - 16.
8Dora brow sky, W.R. Again and again is a disaster what we call "Disaster"? Some conceptual notes on conceptualizing the object of disaster sociology[ J ]. International Journal of Mass Emergencies and Disasters,2003 ( 13 ) :241 - 254.