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Gunes, B.; Cakir, M. A Fitted Approximate Method for Solving Singularly Perturbed Volterra–Fredholm Integro-Differential Equations With an Integral Boundary Condition.
Ukr. Mat. Zhurn. 2024,
76 (1), 115-131.
https://doi.org/10.3842/umzh.v76i1.7331.