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This is to certify that your paper entitled «Impacts of coal shrinkage, permeability and petrography on gas regime in minees case study:tahmoor coal mine,NSW, Australia » was indexed with 7 pages, in the CIVILICA citation database, code COI:JR_JMAE-1-1_001, after evaluation and approval of the referees of the "Journal of Mining and Environment Vol 1, Issue 1 , Year 2015.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above journal and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.