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This is to certify that your paper entitled «Comparison of drag characteristics of toxic self-polishing co-polymers and nontoxic silicone foul release coatings» was indexed with 9 pages, in the CIVILICA citation database, code COI:CEE02_289, after evaluation and approval of the referees of the "2nd Conference of Environmental Engineering held in Tehran 2008.

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.