1. Federal Mine Safety and Health Act of 1977, USA (1997)
2. Code of Federal Regulations, Title 30, USA
3. Handbook of Training in Mine and Recovery Operations 2014, Ontario Mine Rescue, Canada (2014)
4. Personal notes from technical visitations in Meikle and Henderson (USA), Goonyella and Mt. Isa (Australia), Mponeng (The Republic of South Africa) and Kiruna (Sweden)
5. Mine Health and Safety Act No. 74 of 2008, New South Wales (2008)