Oktay A. Veliev, “On the basis property of the root functions of differential operators with matrix coefficients”, Centr. Eur. J. Math., 2011
Djakov P.B., Mityagin B.S., “Convergence of spectral decompositions of Hill operators with trigonometric polynomial potentials”, Doklady Mathematics, 83:1 (2011), 5–7
Fritz Gesztesy, Helge Holden, “The damped string problem revisited”, Journal of Differential Equations, 2011
Gerhard Freiling, “On the behaviour of eigenfunction expansions in the complex domain”, Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 104:1-2 (2011), 73
Djakov P., Mityagin B., “Convergence of spectral decompositions of Hill operators with trigonometric polynomial potentials”, Math Ann, 351:3 (2011), 509–540
Джаков П.Б., Митягин Б.С., “Сходимость спектральных разложений операторов хилла с тригонометрическими многочленами как потенциалы”, Доклады Академии наук, 436:1 (2011), 11–13
O. A. Veliev, “On the nonself-adjoint ordinary differential operators with periodic boundary conditions”, Isr J Math, 176:1 (2010), 195
Djakov P., Mityagin B., “Bari-Markus property for Riesz projections of 1D periodic Dirac operators”, Mathematische Nachrichten, 283:3 (2010), 443–462
О. А. Велиев, А. А. Шкаликов, “О базисности Рисса собственных и присоединенных функций периодической и антипериодической задач Штурма–Лиувилля”, Матем. заметки, 85:5 (2009), 671–686 ; O. A. Veliev, A. A. Shkalikov, “On the Riesz Basis Property of the Eigen- and Associated Functions of Periodic and Antiperiodic Sturm–Liouville Problems”, Math. Notes, 85:6 (2009), 647–660
О. А. Велиев, “О несамосопряженных операторах Штурма–Лиувилля с матричными потенциалами”, Матем. заметки, 81:4 (2007), 496–506 ; O. A. Veliev, “Non-Self-Adjoint Sturm–Liouville Operators with Matrix Potentials”, Math. Notes, 81:4 (2007), 440–448