1. ACARP report, 1996. Trace elements in coal. http://www.acarp.com.au/Newsletters/traceelements.html.
2. ASTM D4606-95, 2000. Determination of arsenic and selenium in coal by the hydride generation/atomic absorption method.
3. ASTM D6357-00a, 2000. Standard test method for determination of trace elements in coal, coke and combustion residues from coal utilization processes by inductively coupled plasma atomic emission spectrometry, inductively coupled plasma mass spectrometry and graphite furnace atomic absorption spectrometry.
4. ASTM D6414-99, 1999. Total mercury in coal and coal combustion residues by acid extraction or wet oxidation/cold vapour atomic absorption.
5. The examination of mineral/organic matter associated in coal;Atkin,1995