1. CTAB, International energy agency coal industry advisory board—32nd plenary meeting discussion report. OECD Headquarters in Paris, 2010.
2. US EPA, Materials characterization paper in support of the advanced notice of proposed rulemaking: identification of nonhazardous materials that are solid waste-coal refuse, December 16, 2008.
3. US EPA, Materials characterization paper in support of the final rulemaking: identification of nonhazardous materials that are solid waste-coal refuse, February 3, 2011.
4. Underground mining with backfill, Australian mining consultants;Grice,1998
5. Cementitious backfill with high sulfur content physical, chemical, and mineralogical characterization;Benzaaoua;Cement Concrete Res.,1999