1. Trace and Minor Elements in Coal;Finkelman,1992
2. The trace element chemistry of coal during combustion and the emissions from coal-fired plants;Smith;Progr. Energy Combust. Sci.,1980
3. The mode of occurrence and concentration of trace elements in coal;Raask;Progr. Energy Combust. Sci.,1985
4. Radian Corporation Final Report submitted to the US EPA under contract number 68-02-4392;Brooks;Report No. EPA-450/2-89-001,1989
5. Trace Metals and Stationary Conventional Combustion Processes;Edwards;EPA Report No. EPA-600/S7-80-155,1981