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This is to certify that your paper entitled «Investigating the Impact of Sustainable Supply Chain on Energy Optimization in the Oil and Gas Industry» was indexed with 11 pages, in the CIVILICA citation database, code COI:OGPC05_124, after evaluation and approval of the referees of the "5th international Biennial Oil, Gas and Petrochemical Conference held in Bushehr 2024.

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.