1. ACGIH (1980): “Documentation of the Threshold Limit Values,” 4th Ed. Cincinnati; American Conference of Governmental Industrial Hygienists Inc.
2. ACGIH (1983): “Threshold Limit Values for Chemical Substances and Physical Agents in the Work Environment With Intended Changes for 1983-84.” Cincinnati: American Conference of Governmental Industrial Hygienists.
3. (1979): Exposure to benzene and alkylbenzenes at a petroleum refinery. Inst. teknisk kemi, Chalmers tekniska högskola, Göteborg (in Swedish).
4. (1983): Federal regulation of toxic substances in the workplace. In (ed): “Safety Evaluation and Regulation of Chemicals.” Basel: S. Karger, pp 58–65.
5. (1979): Exposure to benzene and alkylbenzenes during loading of petrol. Inst. teknisk kemi, Chalmers tekniska högskola, Göteborg (in Swedish).