1. National Institute for Occupational Safety and Health, Review of the literature on crystalline silica (PB83-238733), Cincinnati, OH, 1983.
2. NIOSH, Work-related lung disease surveillance report, CDC DHHS NIOSH No. 94-120, 1994, pp. 58–70.
3. Silica and lung cancer: a controversial issue;Pairon;Eur. Respir. J.,1991
4. Cancer mortality of an Italian cohort of workers in man-made glass-fiber production;Bertazzi;Scand. J. Work Environ. Health,1986
5. IARC Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans, Silica and Some Silicates, 42, Lyon, 1987, pp. 96–108.