1. BHP Billiton Results for The Year Ended 20 June 2016http://www.bhp.com/-/media/bhp/documents/investors/news/2016/160816_bhpbillitonresultsyearended30june2016.pdf?la=en
2. Form 20-F, Annual Report Pursuant to Section 12 or 15(d) of the Securities Exchange Act of 1934http://www.vale.com/EN/investors/information-market/annual-reports/20f/20FDocs/Vale_20-F_FY2016_-_i.pdf
3. Renova Foundation Updatehttp://www.bhp.com/-/media/documents/media/reports-and-presentations/2017/170607_renovafoundationupdate.pdf
4. Deep into the mud: ecological and socio-economic impacts of the dam breach in Mariana, Brazil
5. Design of Tailings Dams and Impoundmentshttp://www.infomine.com/library/publications/docs/Davies2002b.pdf