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This is to certify that your paper entitled «Study on the Effects of Amount of Clay Contents on Undrained Behavior of Clayey Sands Under Anisotropic Consolidation Compression Stress by Means of Undrained Monotonic Triaxial Tests» was indexed with 9 pages, in the CIVILICA citation database, code COI:ICGESM04_122, after evaluation and approval of the referees of the "4th International Conference on Geotechnical Engineering and Soil Mechanics held in Tehran 2010.

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.