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Continue to ChatInverse Problems for the Quadratic Pencil of the Discontinuous Sturm Liouville Equation - https://avesis.cumhuriyet.edu.tr/publication/details/77e95a0e-5d4c-4e98-bf4d-c692aa4609cf/inverse-problems-for-the-quadratic-pencil-of-the-discontinuous-sturm-liouville-equation