1. Colorectal carcinoma in patients under the age of 30 years: a review of 11 cases;Ajao;Journal of the Royal College of Surgeons of Edinburgh,1988
2. Agency for Toxic Substances and Disease Registry (ATSDR), 2002. Toxicological Profile for Wood Creosote, Coal Tar Creosote, Coal Tar, Coal Tar Pitch, and Coal Tar Pitch Volatiles. Atlanta, Georgia; Public Health Service, U.S. Department of Health and Human Services.
3. Agency for Toxic Substances and Disease Registry (ATSDR), 2005. Toxicological Profile for Naphthalene, 1-Methylnaphthalene, and 2-Methylnaphthalene. Atlanta, Georgia; Public Health Service, U.S. Department of Health and Human Services.
4. Cancer mortality among European asphalt workers: an international epidemiological study. II. Exposure to bitumen fume and other agents;Boffetta;American Journal of Industrial Medicine,2003
5. Cancer mortality among European asphalt workers: an international epidemiological study. I. Results of the analysis based on job titles;Boffetta;American Journal of Industrial Medicine,2003