B. N. Biyarov, “Similar transformation of one class of well-defined restrictions”, Eurasian Math. J., 16:1 (2025), 8–21
D. M. Polyakov, “Spectral asymptotics of a non-self-adjoint fourth-order operator with periodic boundary conditions”, Theoret. and Math. Phys., 221:1 (2024), 1615–1632
N. V. Zaitseva, “Uniqueness of the Solution of a Nonlocal Problem for an Elliptic-Hyperbolic Equation with Singular Coefficients”, Math. Notes, 109:4 (2021), 563–569
N. S. Imanbaev, “On nonlocal perturbation of the problem on eigenvalues of differentiation operator on a segment”, Vestn. Udmurtsk. un-ta. Matem. Mekh. Kompyut. nauki, 31:2 (2021), 186–193
N. V. Zaitseva, “Keldysh type problem with an integral condition for two-dimensional $B$-hyperbolic equation”, Moscow University Mathematics Bulletin, 76:5 (2021), 221–229
T. K. Yuldashev, “Spektralnye osobennosti resheniya odnoi kraevoi zadachi dlya integro-differentsialnogo uravneniya Fredgolma vtorogo poryadka s otrazheniem argumenta”, Izv. IMI UdGU, 54 (2019), 122–134
I. S. Lomov, “Spektralnyi metod Ilina ustanovleniya svoistv bazisnosti i ravnomernoi skhodimosti biortogonalnykh razlozhenii na konechnom intervale”, Izv. Sarat. un-ta. Nov. ser. Ser.: Matematika. Mekhanika. Informatika, 19:1 (2019), 34–58
B. E. Kanguzhin, “Operators Whose Resolvents Have Convolution Representations and Their Spectral Analysis”, J. Math. Sci. (N. Y.), 252:3 (2021), 384–398
M. A. Sadybekov, N. S. Imanbaev, “Characteristic determinant of a boundary value problem, which does not have the basis property”, Eurasian Math. J., 8:2 (2017), 40–46
M. A. Sadybekov, N. S. Imanbaev, “A Regular Differential Operator with Perturbed Boundary Condition”, Math. Notes, 101:5 (2017), 878–887