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This is to certify that your paper entitled «Utilizing the fully fuzzy base-criterion method and the optimistic-pessimistic-natural procedure to evaluate the solar panels' deflection» was indexed with 9 pages, in the CIVILICA citation database, code COI:JR_CMDE-14-4_028, after evaluation and approval of the referees of the "Computational Methods for Differential Equations Vol 14, Issue 4 , Year 2026.

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