6Skender LJ. A comparative study of human levels of trichloroethylene and tetrachloroethylene after occupational exposure. Arch Environ Health.1991,46: 174.
7International Agency for Research on Cancer. IARC monographs on the evaluation of carcinogenic risks to humans. Tetrachloroethylene [ M ]. Vol63. Lyon: IARC,1995.
8International Agency for Research on Cancer. IARC monographs on the evaluation of carcinogenic risks to humans. Vol 63: Tetrachloroethylene[M]. Lyon: IRAC, 1995.176-186.
9Vaughan TL, Stewart PA, Davis S, et al. Work in dry cleaning and the incidence of cancer of the oral cavity, larynx, and oesophagus[J]. Occup Environ Med, 1997 ,54:692 - 695.
10Paulu C, Aschengrau A, Ozonoff D, et al. Tetrachloroethylene-contaminated drinking water in Massachusetts and the risk of colon-rectum,lung, and other cancers[J]. Environ Health Persp,1999, 107(4):265-271.