+++2 статьи Sciencedirect

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1. Fuel
Volume 72, Issue 7, July 1993, Pages 965-970
Coal proximate analyses correlation with airborne respirable dust
S.J. Pagec, d, J.A. Organiscakc, d and J. Quattroc,

DOI:

http://dx.doi.org/10.1016/0016-2361(93)90293-B

2.Environmental Pollution
Volume 148, Issue 2, July 2007, Pages 459-467
Determination of trace rare earth elements in coal fly ash and atmospheric particulates by electrothermal vaporization inductively coupled plasma mass spectrometry with slurry sampling
Yuefei Zhanga, Zucheng Jianga, Man Hea and Bin Hu

DOI:

http://dx.doi.org/10.1016/j.envpol.2006.12.004

спасибо, коллеги)))

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огромное спасибо