1. S. Thompson and F. Lawson: Proc. Aus. Inst. Min. Metall., 1984, vol. 289, pp. 113–16.
2. International Agency for Research on Cancer: IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 1990, vol. 49.
3. G. Darrie: 18th Conf. of Society for Enivronmental Geochemistry and Health, Glasgow, United Kingdom, 2000, p. 5.
4. H.X. Fang, H.Y. Li and B. Xie: ISIJ Int., 2012, vol. 52, pp. 1958–65.
5. L.H. Zhou, J. Wang, S.Y. Gou, L.Y. Chen and Z.R. Li: Appl. Mech. Mater., 2012, vol. 184, pp. 949–53.