3BUNZL K,SCHIMMACK W. Interception and retention of Chernobyl- derived ^137cs,^134Cs,^106 Ru in a spruce stand [J]. The Science of the Total Environment,1989,78:77-78.
4WANG X H. Physic - chemical behavior of radio nuclides in fore.st soils of the evacuated region of the Chemobyl NPP < PHD paper > [ D ]. Imperial College,London University, 1996.
6SCHLENKER S, DEGERING D, UNTERRICKER S. Distribution of radionuclides in forest soils of varying pedo- chemistry[J]. Radiation physics and chemistry, 2001, 61 : 705 -706.
7ERIKSSON M, HOLM E, ROOS P,et al. Distribution and flux of ^238Pu,^239,240Pu,^241Am,^137Cs and ^210Pb to high arctic lakes in the Thule district(Greenland) [J]. Journal of environmental radioactivity ,2004. ,75:285-299.
