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This is to certify that your paper entitled «Experimental investigation of full scale underground concrete chambers reinforced with GFRP bars» was indexed with 7 pages, in the CIVILICA citation database, code COI:NCNMS06_083, after evaluation and approval of the referees of the "The 6th National Conference and the 2nd International Conference on Civil Engineering Materials and Structures held in Yazd 2017.

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 conference 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.