Int. J. Clean Coal Energy Vol.9 No.2, March 31, 2020 DOI: 10.4236/ijcce.2020.92002
Int. J. Clean Coal Energy Vol.9 No.1, February 28, 2020 DOI: 10.4236/ijcce.2020.91001
Int. J. Clean Coal Energy Vol.8 No.2, May 31, 2019 DOI: 10.4236/ijcce.2019.82002
Int. J. Clean Coal Energy Vol.8 No.1, February 28, 2019 DOI: 10.4236/ijcce.2019.81001
Int. J. Clean Coal Energy Vol.7 No.4, November 28, 2018 DOI: 10.4236/ijcce.2018.74004
Int. J. Clean Coal Energy [ISSUE], [PUBDATE] DOI: [DOI]