7DAVID F N, MOORE P G. Notes on contagious distribu- tions in plant populations [ J ]. Ann Bot, 1954,18:47-53.
8ARBOUS A G,KERRICH J E. Accident statistics and the concept of accident-proneness [ J ]. Biometrics, 1951,7 : 340-432.
9BLACKITH R E. Nearest-neighbour distance measurements for the estimation of animal populations [ J ]. Ecology, 1958,39,147-150.
10Akio T. Bionomics, monitoring and control of Scirtothripsdorsalis Hood (yellow tea thrips ) in citrus groves[J]. Special Bulletin No. 7 Shizuoka Prefectural Citrus Exper- iment Station, 1995, 3: 1-2.