1. Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete;ASTM Standard C618-08a,2011
2. ASTM Standard D5987-96, 2002 (Reapproved 2007), Standard test method for total fluorine in coal and coke by pyrohydrolytic extraction and ion selective electrode or ion chromatograph methods, ASTM International, West Conshohocken, PA, 2011.
3. Value of phase content of germanium-contained materials and choose of methods of its opening;Blayda,2007
4. Trace Elements—Emissions from Coal Combustion and Gasification;Clarke,1992