1. Ahlborg G, Bergström B, Hogstedt C, Emistö P, Sorsa M (1985) Urinary screening for potentially genotoxic exposures in a chemical industry. Br J Ind Med 42:691?699
2. Bayhan A, Burgaz S, Karakaya AE (1987) Urinary thioether excretion in nurses at an oncologic department. J Clin Pharmacol Therap 12:303?306
3. Brandt HCA, De Groot PC, Molyneux MKB, Tindlet PE (1985) Sampling and analysis of bitumen fumes. Ann Occup Hyg 29:27?80
4. Donald M, Zimmer A (1967) Atlas of clinical laboratory procedures, vol 1. The Blakiston Division, McGraw-Hill Book Company, New York
5. Polynuclear aromatic compounds, bitumens, coal-tars and derived products, shaleoils and soots, Part 4;International Agency for Research on Cancer,1985