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This is to certify that your paper entitled «Change-point-based hybrid stochastic differential equation models: the case of WTI crude oil prices» was indexed with 21 pages, in the CIVILICA citation database, code COI:JR_CMDE-14-4_020, after evaluation and approval of the referees of the "Computational Methods for Differential Equations Vol 14, Issue 4 , Year 2026.

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