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This is to certify that your paper entitled «On the effect of using phase change materials in energy consumption and CO2 emission in buildings in Iran: a climatic and parametric study» was indexed with 9 pages, in the CIVILICA citation database, code COI:JR_EES-3-2_001, after evaluation and approval of the referees of the "Energy Equipment and Systems Vol 3, Issue 2 , Year 2016.

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.