1. ACGIH. American Conference of Governmental Industrial Hygienists: Draft recommended TLV documentations for diesel exhaust particulate (aerodynamic diameter <1 micron). American Conference of Governmental Industrial Hygienists, Cincinnati, OH 2000
2. Ahlvik, P. Environmental and health impact from modern cars. A comparison between two petrol and two diesel cars with varying emission control technology. A report for the Swedish National Road Administration, Vehicle Standards Division. Börlange. 2002, Sweden, Ecotraffic R&D 3 AB, Vägverkethttp://www.vv.se/publ_blank/bokhylla/miljo/lista.htm
3. Lung cancer, stomach cancer, and smoking status among coal miners. A preliminary test of a hypothesis.
4. Does Coal Mine Dust Present a Risk for Lung Cancer? A Case-Control Study of U.S. Coal Miners