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1. Ganji DD, Azimi M. Application of max min approach and amplitude frequency formulation to nonlinear oscillation systems. UPB Scientific Bulletin. 2012 Jan 1;74(3):131-40.
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2. Suleman M, Lu D, Yue C, Ul Rahman J, Anjum N. He–Laplace method for general nonlinear periodic solitary solution of vibration equations. Journal of Low Frequency Noise, Vibration and Active Control. 2019 Dec;38(3-4):1297-304.10.1177/1461348418816266
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3. He JH. A short remark on fractional variational iteration method. Physics Letters A. 2011 Sep 5;375(38):3362-4.10.1016/j.physleta.2011.07.033
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4. He JH. Variational iteration method–a kind of non-linear analytical technique: some examples. International journal of non-linear mechanics. 1999 Jul 1;34(4):699-708.10.1016/S0020-7462(98)00048-1
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5. He JH. Variational principles for some nonlinear partial differential equations with variable coefficients. Chaos, Solitons & Fractals. 2004 Mar 1;19(4):847-51.10.1016/S0960-0779(03)00265-0
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6. He JH. Variational approach to (2+ 1)-dimensional dispersive long water equations. Physics Letters A. 2005 Feb 7;335(2-3):182-4.10.1016/j.physleta.2004.12.019
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7. ul Rahman J, Mohyuddin MR, Anjum N, Zahoor S. Mathematical Modelling and Simulation of Mixing of Salt in 3-Interconnected Tanks. Journal of Advances in Civil Engineering. 2015;1(1):1-6.10.18831/djcivil.org/2015011001
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8. Anjum N, Ain QT. Application of He’s fractional derivative and fractional complex transform for time fractional Camassa-Holm equation. Thermal Science. 2020;24(5 Part A):3023-30.10.2298/TSCI190930450A
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9. Anjum N, He JH. Analysis of nonlinear vibration of nano/microelectromechanical system switch induced by electromagnetic force under zero initial conditions. Alexandria Engineering Journal. 2020 Dec 1;59(6):4343-52.10.1016/j.aej.2020.07.039
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10. Ain QT, Anjum N, He CH. An analysis of time-fractional heat transfer problem using two-scale approach. GEM-International Journal on Geomathematics. 2021 Dec;12(1):1-010.1007/s13137-021-00187-x
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11. He JH, El-Dib YO. Homotopy perturbation method for Fangzhu oscillator. Journal of Mathematical Chemistry. 2020 Nov; 58(10): 2245-53.10.1007/s10910-020-01167-6
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12. He JH, El-Dib YO, Mady AA. Homotopy perturbation method for the fractal toda oscillator. Fractal and Fractional. 2021 Sep;5(3):93.10.3390/fractalfract5030093
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13. Suleman M, Lu D, He JH, Farooq U, Hui YS, Rahman JU. Numerical investigation of fractional HIV model using Elzaki projected differential transform method. Fractals. 2018 Oct 5;26(05):1850062.10.1142/S0218348X18500627
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14. Ul Rahman J, Lu D, Suleman M, He JH, Ramzan M. He–Elzaki method for spatial diffusion of biological population. Fractals. 2019 Aug 13;27(05):1950069.10.1142/S0218348X19500695
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15. He CH, Liu C, He JH, Gepreel KA. Low frequency property of a fractal vibration model for a concrete beam. Fractals. 2021;29(5):2150117-33.10.1142/S0218348X21501176
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16. Anjum N, He JH. Higher-order homotopy perturbation method for conservative nonlinear oscillators generally and microelectro-mechanical systems’ oscillators particularly. International Journal of Modern Physics B. 2020 Dec 30;34(32):2050313.10.1142/S0217979220503130
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17. Tian D, Ain QT, Anjum N, He CH, Cheng B. Fractal N/MEMS: from pull-in instability to pull-in stability. Fractals. 2021 Mar 10;29(02):2150030.10.1142/S0218348X21500304
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18. Ain QT, Anjum N, He CH. An analysis of time-fractional heat transfer problem using two-scale approach. GEM-International Journal on Geomathematics. 2021 Dec;12(1):1-0.10.1007/s13137-021-00187-x
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19. Ain QT, He JH, Anjum N, Ali M. The fractional complex transform: A novel approach to the time-fractional Schrödinger equation. Fractals. 2020 Nov 2;28(07):2050141.10.1142/S0218348X20501418
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20. ul Rahman J, Mohyuddin MR, Anjum N, Butt R. Modelling of Two Interconnected Spring Carts and Minimization of Energy. DJ Journal of Engineering and Applied mathematics. 2016;2(1):7-11.10.18831/djmaths.org/2016011002
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21. Ali M, Anjum N, Ain QT, He JH. Homotopy perturbation method for the attachment oscillator arising in nanotechnology. Fibers and Polymers. 2021 Jun;22(6):1601-6.10.1007/s12221-021-0844-x
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22. Rahman JU, Suleman M, Anjum N. Solution of unbounded boundary layer equation using modified homotopy perturbation method. Int. J. Macro Nano Phys. 2018;3(1):11-5.10.18831/djphys.org/2018011003
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23. He JH. Some asymptotic methods for strongly nonlinear equations. International journal of Modern physics B. 2006 Apr 20;20(10):1 141-99.10.1142/S0217979206033796
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24. Noor MA, Mohyud-Din ST. Variational iteration method for solving higher-order nonlinear boundary value problems using He’s polynomials. International Journal of Nonlinear Sciences and Numerical Simulation. 2008 Jun 1;9(2):141-56.10.1515/IJNSNS.2008.9.2.141
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25. He JH. Generalized equilibrium equations for shell derived from a generalized variational principle. Applied Mathematics Letters. 2017 Feb 1;64:94-100.10.1016/j.aml.2016.08.008
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26. He JH. An alternative approach to establishment of a variational principle for the torsional problem of piezoelastic beams. Applied Mathematics Letters. 2016 Feb 1;52:1-3.10.1016/j.aml.2015.08.001
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27. Wu Y, He JH. A remark on Samuelson’s variational principle in economics. Applied Mathematics Letters. 2018 Oct 1;84:143-7.10.1016/j.aml.2018.05.008
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28. Anjum N, He JH. Laplace transform: making the variational iteration method easier. Applied Mathematics Letters. 2019 Jun 1;92:134-8.10.1016/j.aml.2019.01.016
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29. He JH. Variational iteration method—some recent results and new interpretations. Journal of computational and applied mathematics. 2007 Oct 1;207(1):3-17.10.1016/j.cam.2006.07.009
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30. He JH, Wu XH. Variational iteration method: new development and applications. Computers & Mathematics with Applications. 2007 Oct 1;54(7-8):881-94.10.1016/j.camwa.2006.12.083
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31. He JH. Variational iteration method for autonomous ordinary differential systems. Applied mathematics and computation. 2000 Sep 11;114(2-3):115-23.10.1016/S0096-3003(99)00104-6
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32. He JH. Variational theory for linear magneto-electro-elasticity. International Journal of Nonlinear Sciences and Numerical Simulation. 2001 Dec 1;2(4):309-16.10.1515/IJNSNS.2001.2.4.309
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33. He J. Variational iteration method for delay differential equations. Communications in Nonlinear Science and Numerical Simulation. 1997 Dec 1;2(4):235-6.10.1016/S1007-5704(97)90008-3
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34. He JH. An improved amplitude-frequency formulation for nonlinear oscillators. International Journal of Nonlinear Sciences and Numerical Simulation. 2008 Jun 1;9(2):211-2.10.1515/IJNSNS.2008.9.2.211
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