Gu J G, Qiao C, Gu J D
Key Laboratory of Terrestrial Ecological Process, Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, People's Republic of China.
Bull Environ Contam Toxicol. 2003 Nov;71(5):924-32. doi: 10.1007/s00128-003-0221-z.