Moura Coal> Hamed Lamei Ramandi, Peyman Mostaghimi, Ryan T Armstrong, Mohammad Saadatfar, W Val Pinczewski. Porosity and permeability characterization of coal: a micro-computed tomography study. Elsevier. 2016. Links http://dx.doi.org/10.1016/j.coal.2015.10.001 10.1016/j.coal.2015.10.001