T. Sh. Kal'menov, B. T. Torebek, “On an ill-posed problem for the Laplace operator with nonlocal boundary condition”, Eurasian Math. J., 8:1 (2017), 50–57
Е. А. Ширяев, “Базисность собственных и присоединенных функций оператора с неплотной областью определения на примере задачи Орра–Зоммерфельда”, Матем. заметки, 102:6 (2017), 931–937 ; E. A. Shiryaev, “Basis Property of Eigen- and Associated Functions of an Operator with Nondense Domain of Definition in the Example of the Orr–Sommerfeld problem”, Math. Notes, 102:6 (2017), 867–872
Kal'menov T.Sh. Torebek B.T., “On An Ill-Posed Problem For the Laplace Operator With Nonlocal Boundary Condition”, Eurasian Math. J., 8:1 (2017), 50–57
O. A. Veliev, “Essential spectral singularities and the spectral expansion for the Hill operator”, Communications on Pure & Applied Analysis, 16:6 (2017), 2227
L. V. Kritskov, A. M. Sarsenbi, “Riesz basis property of system of root functions of second-order differential operator with involution”, Diff Equat, 53:1 (2017), 33
А. А. Шкаликов, “Возмущения самосопряженных и нормальных операторов с дискретным спектром”, УМН, 71:5(431) (2016), 113–174 ; A. A. Shkalikov, “Perturbations of self-adjoint and normal operators with discrete spectrum”, Russian Math. Surveys, 71:5 (2016), 907–964
Anton A. Lunyov, Mark M. Malamud, “On the Riesz basis property of root vectors system for 2 × 2 Dirac type operators”, Journal of Mathematical Analysis and Applications, 441:1 (2016), 57
F. Seref, O. A. Veliev, “On Sharp Asymptotic Formulas for the Sturm–Liouville Operator with a Matrix Potential”, Матем. заметки, 100:2 (2016), 291–297 ; F. Seref, O. A. Veliev, “On Sharp Asymptotic Formulas for the Sturm–Liouville Operator with a Matrix Potential”, Math. Notes, 100:2 (2016), 291–297
Cemile Nur, O. A. Veliev, “On the basis property of the root functions of Sturm–Liouville operators with general regular boundary conditions”, Mosc. Math. J., 15:3 (2015), 511–526
А. М. Савчук, И. В. Садовничая, “Базисность Рисса со скобками для системы Дирака с суммируемым потенциалом”, Труды Седьмой Международной конференции по дифференциальным и функционально-дифференциальным уравнениям (Москва, 22–29 августа, 2014). Часть 1, СМФН, 58, РУДН, М., 2015, 128–152 ; A. M. Savchuk, I. V. Sadovnichaya, “The Riesz basis property with brackets for Dirac systems with summable potentials”, Journal of Mathematical Sciences, 233:4 (2018), 514–540