1. 1) International Labour Organization. Safety and health at the heart of the future of work 2019. https://www.ilo.org/wcmsp5/groups/public/-dgreports/-dcomm/documents/publication/wcms_686645.pdf. Accessed May 20, 2019.
2. 2) Hämäläinen P, Takala J, Boon Kiat T (2017) Global estimates of occupational accidents and work-related illnesses 2017. XXI World Congress on Safety and Health at Work, Singapore, Workplace Safety and Health Institute.
3. 3) Takala J, Hämäläinen P, Saarela KL, Yun LY, Manickam K, Jin TW, Heng P, Tjong C, Kheng LG, Lim S, Lin GS (2014) Global estimates of the burden of injury and illness at work in 2012. J Occup Environ Hyg11, 326–37.
4. 4) Mine Safety and Health Administration. https://www.msha.gov/data-reports/fatality-reports/search. Accessed May 15, 2019.
5. 5) Minerals Council South Africa. Facts and figures 2017. https://www.mineralscouncil.org.za/industry-news/publications/facts-and-figures. Accessed May10, 2019.