1. ECOBA (European Coal Combustion Product Association). ; 2010 [accessed 15.11.12].
2. Application of sugar foam to a pyrite-contaminated soil;Moraza;Miner Eng,2006
3. UNE-EN-13055-1. Áridos ligeros. Parte 1: Áridos ligeros para hormigón, mortero e inyectado, 2003.
4. Construction uses-insulation. Industrial minerals and rocks;Bodycomb,2000
5. Construction uses-lightweight aggregates. Industrial minerals and rocks;Mason,2000