Leonid Pavlovych Nyzhnyk (on his 90th birthday)

1. L. P. Nizhnik, Inverse nonlocal Sturm–Liouville problem, Inverse Problems, 26, № 12, Article~125006 (2010); https://doi.org/10.1088/0266-5611/26/12/125006.

2. M. E. Dudkin, L. P. Nizhnik, Singularly perturbed normal operators, Methods Funct. Anal. and Topology, 16, № 4, 298–303 (2010).

3. Yu. M. Berezansky, J. Brasche, L. P. Nizhnik, On generalized selfadjoint operators on scales of Hilbert spaces, Methods Funct. Anal. and Topology, 17, № 3, 193–198 (2011).

4. L. Nizhnik, Inverse spectral nonlocal problem for the first order ordinary differential equation, Tamkang J. Math., 42, № 3, 385–394 (2011).

5. L. Nizhnik, Inverse eigenvalue problems for nonlocal Sturm–Liouville operators on a star graph, Methods Funct. Anal. and Topology, 18, № 1, 68–78 (2012).

6. J. Brasche, L. Nizhnik, One-dimensional Schrödinger operators with general point interactions, Methods Funct. Anal. and Topology, 19, № 1, 4–15 (2013).

7. J. Brasche, L. Nizhnik, One-dimensional Schrödinger operators with $δ'$-interactions on a set of Lebesgue measure zero, Operators and Matrices, 7, № 4, 887–904 (2013).

8. S. Albeverio, L. Nizhnik, Schrödinger operators with nonlocal potentials, Methods Funct. Anal. and Topology, 19, № 3, 199–210 (2013).

9. В. О. Лебідь, Л. П. Нижник, Спектральний аналiз зіркового графа з одним нескінченним променем, Наук. зап. НаУКМА, 126, 9–16 (2013).

10. В. О. Лебідь, Л. П. Нижник, Спектральний аналіз локально скінченних графів з одним нескінченним променем, Доп. НАН України, № 3, 29–35 (2014).

11. В. О. Лебідь, Л. П. Нижник, Спектральний аналіз деяких графів з нескінченними променями, Укр. мат. журн., № 9, 1193–1204 (2014).

12. L. P. Nizhnik, Spectral analysis of metric graphs with infinite rays, Methods Funct. Anal. and Topology, 20, № 4, 391–396 (2014).

13. Л. П. Нижник, І. Л. Нижник, Инвариантные меры при отображении отрезка на себя, Збірник праць Інституту математики НАН України, 12, № 2, 307–314 (2015)

(Nizhnik L., Nizhnik I., Invariant measures with respect to the mapping of the segment on itself, Transactions of Institute of Mathematics NAS of Ukraine, 12, № 2, 307–314 (2015)).

14. L. Nizhnik, Inverse spectral problems for Jacobi matrix with finite perturbed parameters, Methods Funct. Anal. and Topology, 21, № 3, 256–265 (2015).

15. L. Nizhnik, S. Rabanovich, On new inverse spectral problems for weighted graphs, Methods Funct. Anal. and Topology, 23, № 1, 66–75 (2017).

16. P. Cojuhari, L. Nizhnik, Hochstadt inverse eigenvalue problem for Jacobi matrices, J. Math. Anal. and Appl., 455, 439–451 (2017); https://doi.org/10.1016/j.jmaa.2017.05.014.

17. S. Kuzhel, L. Nizhnik, Phillips symmetric operators and their extensions, Banach J. Math. Anal., 12, № 4, 995–1016 (2018); https://doi.org/10.1215/17358787-2018-0009.

18. L. Nizhnik, On the inverse eigenvalue problems for a Jacobi matrix with mixed given data, Methods Funct. Anal. and Topology, 24, № 2, 178–186 (2018).

19. K. Debowska, L. Nizhnik, Direct and inverse spectral problems for Dirac systems with nonlocal potentials, Opuscula Math., 39, № 5, 645–673 (2019); https://doi.org/10.7494/OpMath.2019.39.5.645.

20. P. Cojuhari, L. Nizhnik, Scattering problem for Dirac system with nonlocal potentials, Methods Funct. Anal. and Topology, 25, № 3, 211–218 (2019).

21. Л. Нижник, І. Нижник, Детермінована дифузія, Укр. мат. журн., 71, № 11, 1553–1569 (2019); (English translation: Ukr. Math. J., 71, № 11, 1781–1801 (2020)); https://doi.org/10.1007/s11253-020-01747-4.

22. L. P. Nizhnik, Self-adjoint operators with nonlocal interaction, COIA20, Baku, August 26–28 (2020); http://coia-conf.org/en/view/pages/22.

23 L. P. Nizhnik, The Cauchy problem for the $(2+1)$ integrable nonlinear Schrödinger equation} (2023); https: doi.org/10.48550/arXiv.2305.06182.

24. L. P. Nizhnik, Well-posed Cauchy problem and the Hamiltonian form of $(2+1)$ nonlinear equations integrable by inverse scattering transform (2024); https://doi.org/10.48550/arXiv.2412.16801.