Berikbol T. Torebek, Batirkhan Kh. Turmetov, 1676, 2015, 020096
B. E. Kanguzhin, K. S. Tulenov, “Correctness of the definition of the Laplace operator with delta-like potentials”, Complex Variables and Elliptic Equations, 67, № 4, 2022, 898
Baltabek Kanguzhin, Ziganur Fazullin, “On the localization of the spectrum of some perturbations of a two-dimensional harmonic oscillator”, Complex Variables and Elliptic Equations, 66, № 6-7, 2021, 1194
Aizat Sh. Aimakhanova, Saltanat Kh. Shalginbayeva, Lyazzat K. Zhumanova, 1759, 2016, 020034
B. E. Kanguzhin, D. Dauitbek, “A maximum of the first eigenvalue of semibounded differential operator with a parameter”, Russ Math., 61, № 2, 2017, 10
B. E. Kanguzhin, K. S. Tulenov, “Singular perturbations of Laplace operator and their resolvents”, Complex Variables and Elliptic Equations, 65, № 9, 2020, 1433
Gulzat Nalzhupbayeva, Niyaz Tokmagambetov, 216, Functional Analysis in Interdisciplinary Applications, 2017, 267
Baltabek Kanguzhin, Niyaz Tokmagambetov, Nurken Bekbayev, 1676, 2015, 020101
B. E. Kanguzhin, “Weinstein Criteria and Regularized Traces in the Case of Transverse Vibrations of an Elastic String with Springs”, Diff Equat, 54, № 1, 2018, 7