id	domain	url
esrj-61633	dx.doi.org	http://dx.doi.org/10.15446/esrj.v20n4.61633
esrj-61633	dx.doi.org	http://dx.doi.org/10.15446/esrj.v20n4.61633
esrj-61633	dx.doi.org	http://dx.doi.org/10.2118/153144-ms
esrj-61633	dx.doi.org	http://dx.doi.org/10.2118/114172-ms
esrj-61633	dx.doi.org	http://dx.doi.org/10.2118/4711-a
esrj-61633	dx.doi.org	http://dx.doi.org/10.18280/eesrj.020105
esrj-61633	dx.doi.org	http://dx.doi.org/10.2118/47820-ms
esrj-61633	dx.doi.org	http://dx.doi.org/10.2118/21813-ms
esrj-61633	dx.doi.org	http://dx.doi.org/10.2118/08-10-33
esrj-61633	dx.doi.org	http://dx.doi.org/10.1016/j.coal.2006.12.001