1. State Administration of Work Safety, Coal Mine Safety Regulations [M] Coal Industry Press (2016)
2. American government. Mandatory safety standards-underground coal mines[EB/0L].
http://www.ecfr.gov/cgi-bin/text-idx?SID=b5bcl5f723dlca0ba48a3df4bacba3a&node=pt30.1.5&rgn=div5#se30.1.75_1310
. Accessed 3 March 2019
3. Alabama government. Alabama code[EB/0L].
http://codes.1p.findlaw.corn/alcodB/25/9/4/25-9-80
. Accessed 3 March 2019
4. Government of Canada. Coal Mining Occupational Healthand Safety Regulations(SOR/90-97) [EB/OL].
http://laws-lois.justice.gc.ca/eng/regulations/sor-90-97/page-1.html
. Accessed 3 March 2019
5. Department of Minerals And Energy. Mine health and safety act 29 of 1996[EB/OL].
http://www.acts.co.za/mine-health-and-safety-act-1996/
. Accessed 3 March 2019