GOST R 54237-2010 Solid mineral fuels. Determination of chemical composition of ash by method of atomic emission spectrometry with inductively coupled plasma
GOST R 55879-2013 Solid mineral fuels. Determination of chemical composition of ash by X-Ray fluorescence
GOST R 57011-2016 history
2016GOST R 57011-2016 Production and preparation waste of coal. Classification