Presented to

[نام نویسنده را انتخاب نمایید]

This is to certify that your paper entitled «Bubble Behavior in an Ultrasonic Field, Stability Analyses with Bifurcation Diagram: Effect of Polytropic Gas Exponent, Hydrostatic Pressure and Ultrasonic Pressure» was indexed with 8 pages, in the CIVILICA citation database, code COI:EHCONF04_262, after evaluation and approval of the referees of the "چهارمین کنفرانس بین المللی مهندسی و علوم انسانی 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 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.