Distribution of trace elements in selected pulverized coals as a function of particle size and density - Senior, C.L.; Zeng, T.; Che, J.; Ames, M.R.; Sarofim, A.F.; Olmez, I.; Huggins, Frank; Shah, N.; Huffman, G.P.; Kolker, A.; Mroczkowski, S.; Palmer, C.; et al. (Fuel Processing Technology, 2000)