1. Agency for Toxic Substances and Disease Registry (ATSDR) (1993). “Cancer Policy Framework.” U.S. Department of Health and Human Services, Atlanta, GA.
2. American Conference of Governmental Industrial Hygienists (1984). “Threshold Limit Values—Discussion and Thirty-Five Year Index with Recommendations.” American Conference of Governmental Industrial Hygienists, Cincinnati, Ohio.
3. American Conference of Governmental Industrial Hygienists (1992). “Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices.” American Conference of Governmental Industrial Hygienists, Cincinnati, Ohio.
4. Ranking of complex chemical mixtures for potential cancer hazard: Structure of a computerized system—An outline;Arcos;Environ. Carcinogen. Rev.,1989
5. Generalized model for the joint action of mixtures of drugs;Ashford;Biometrics,1981