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This is to certify that your paper entitled «A sustainable design approach for reinforcing plastic product concepts incorporating the TRIZ method without contradiction analysis» was indexed with 11 pages, in the CIVILICA citation database, code COI:EISTC09_025, after evaluation and approval of the referees of the "Ninth International Conference on New Strategies in Engineering, Information Science and Technology in the Century to Come 2021.

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.