Numerical solution of the Klein–Gordon equation via He’s variational iteration method

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Numerical solution of the nonlinear Klein-Gordon equation using radial basis functions (2009, methodology): “The Klein–Gordon equation is solved in [37] using the variational iteration method.”
A numerical method for solution of the two-dimensional sine-Gordon equation using the radial basis functions (2008, background): “The main idea behind the new approach can be investigated to solve the partial differential equations studied in [42–45].”
Solving nonlinear fractional partial differential equations using the homotopy analysis method (2010, methodology): “Wazwaz [23], examined the KdV, the K(2, 2), the Burgers, and the cubic Boussinesq equations by using variational iteration method (VIM) [40–51].”
The use of He's variational iteration method for solving the telegraph and fractional telegraph equations (2011, methodology): “The variational iteration method is used in [30] for solving the Lane–Emden equation, in [31] to solve several problems in calculus of variations, in [32] to find the solution of an inverse problem in partial differential equations, in [33] to solve a system of nonlinear integro-differential equatio”