International Journal of Coal Geology
International Journal of Coal Geology > 2016 > 157 > C > 39-51
International Journal of Coal Geology > 2016 > 168 > P1 > 3-19
International Journal of Coal Geology > 2016 > 157 > C > 39-51
International Journal of Coal Geology > 2016 > 168 > P1 > 3-19