1. Coal deposits a potential alternative sources for lanthanides and yttrium;Seredin;Int J Coal Geol,2012
2. Chemical studies of stack fly ash from a coal-fired power plant;Coles;Am Chem Soc,1979
3. Leaching behavior of elements from coal combustion fly ash: an overview;Izquierdo;Int J Coal Geol,2012
4. Determination of germanium content in coal ash by wavelength-dispersive X-ray fluorescence spectroscopy and inductive coupled plasma-mass spectroscopy;Zhang;Proc Denver X-ray Conf, Adv X-ray Anal,1997
5. Arrioyo F, Font O, Fernandez-Pereira C, Querol X, Chimenos JP, Zeegers H. Germanium and gallium extraction from gasification flyash: optimisation for up-scaling a recovery process. In: World of coal ash conference; 2009. .