Inverse Eigenvalue Problems for Nonlocal Sturm-Liouville Operators von Nizhnik, L.P.

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Approximation of general zero-range potentials von Albeverio, S., Nizhnik, L.P.

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Singularly perturbed self-adjoint operators in scales of Hilbert spaces von Albeverio, S., Kuzhel, S., Nizhnik, L.

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Invariant measures with respect to the mapping of the segment on itself von Nizhnik, I. L., Nizhnik, L. P., Нижник, И. Л., Нижник, Л. П., Нижник, И. Л., Нижник, Л. П.

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