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This is to certify that your paper entitled «A Cost-free Alternative Approach to Simulation of Pressure Transient Response for Slightly Compressible Fluids» was indexed with 5 pages, in the CIVILICA citation database, code COI:JR_JPSTR-11-31_005, after evaluation and approval of the referees of the "The Journal of Petroleum Science and Technology Vol 11, Issue 31 , Year 2023.

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.