俊毅 陈, “Periodic Solutions of Nonlinear Beam Equation with x-Dependent Coefficient”, PM, 15:02 (2025), 25
Xiao Han, Hui Wei, “Multiplicity of the large periodic solutions to a super-linear wave equation with general variable coefficient”, CAM, 16:2 (2024), 278
Jiayu Deng, Shuguan Ji, “Periodic solutions for a coupled system of wave equations with x-dependent coefficients”, Advanced Nonlinear Studies, 2024
А. Т. Асанова, “К теории периодических решений систем гиперболических уравнений на плоскости”, Геометрия, механика и дифференциальные уравнения, Итоги науки и техн. Соврем. мат. и ее прил. Темат. обз., 210, ВИНИТИ РАН, М., 2022, 35–48
Shuguan Ji, “Periodic solutions of two-dimensional wave equations with x-dependent coefficients and Sturm–Liouville boundary conditions”, Nonlinearity, 35:10 (2022), 5033
Wei H. Ji Sh., “Existence of Multiple Periodic Solutions to a Semilinear Wave Equation Withx-Dependent Coefficients”, Proc. R. Soc. Edinb. Sect. A-Math., 150:5 (2020), PII S0308210519000258, 2586–2606
Wei H. Ji Sh., “Infinitely Many Periodic Solutions For a Semilinear Wave Equation With X-Dependent Coefficients”, ESAIM-Control OPtim. Calc. Var., 26 (2020), UNSP 7
Yan L., Ji Sh., Sun L., “Asymptotic Bifurcation Results For Coupled Nonlinear Wave Equations With Variable Coefficients ?”, J. Differ. Equ., 269:9 (2020), 7157–7170
Ma M., Ji Sh., “Time Periodic Solutions of One-Dimensional Forced Kirchhoff Equations With X-Dependent Coefficients Under Spatial Periodic Conditions”, Anal. Math. Phys., 9:4 (2019), 2345–2366
Ji Sh., “Periodic Solutions For One Dimensional Wave Equation With Bounded Nonlinearity”, J. Differ. Equ., 264:9 (2018), 5527–5540
Ma M., Ji Sh., “Time Periodic Solutions of One-Dimensional Forced Kirchhoff Equations With X-Dependent Coefficients”, Proc. R. Soc. A-Math. Phys. Eng. Sci., 474:2213 (2018), 20170620
И. А. Рудаков, “Периодические решения квазилинейного уравнения вынужденных колебаний неоднородной струны”, Матем. заметки, 101:1 (2017), 116–129; I. A. Rudakov, “Periodic Solutions of the Quasilinear Equation of Forced Vibrations of an Inhomogeneous String”, Math. Notes, 101:1 (2017), 137–148
Ji Sh., Gao Ya., Zhu W., “Existence and Multiplicity of Periodic Solutions for Dirichlet?Neumann Boundary Value Problem of a Variable Coefficient Wave Equation”, Adv. Nonlinear Stud., 16:4 (2016), 765–773
Rudakov I.A., “Periodic solutions of the wave equation with nonconstant coefficients and with homogeneous Dirichlet and Neumann boundary conditions”, Differ. Equ., 52:2 (2016), 248–257
Игорь Рудаков, Igor Rudakov, “PERIODIC SOLUTIONS PROBLEM OF HETEROGENEOUS STRING FORCED OSCILLATIONS EQUATION WITH BOUNDARY CONDITION OF THE THIRD TYPE”, Bulletin of Bryansk state technical university, 2016:4 (2016), 99
I. A. Rudakov, “Periodic Solutions to the Wave Equation with Homogeneous Boundary Conditions”, J Math Sci, 219:2 (2016), 253
Игорь Рудаков, Igor Rudakov, “Periodic vibrations of nongomogeneous string with clamped and free ends.”, Bulletin of Bryansk state technical university, 2015:3 (2015), 83
Игорь Рудаков, Igor Rudakov, Алексей Лукавый, Aleksey Lukavyy, “Periodic solutions of a quasilinear wave equations with variable coefficients.”, Bulletin of Bryansk state technical university, 2014:3 (2014), 147
Ji Sh., Li Y., “Time Periodic Solutions to the One-Dimensional Nonlinear Wave Equation”, Arch Ration Mech Anal, 199:2 (2011), 435–451
И. А. Рудаков, “О периодических по времени решениях квазилинейного волнового уравнения”, Дифференциальные уравнения и динамические системы, Сборник статей, Труды МИАН, 270, МАИК «Наука/Интерпериодика», М., 2010, 226–232; I. A. Rudakov, “On time-periodic solutions of a quasilinear wave equation”, Proc. Steklov Inst. Math., 270 (2010), 222–229