Harmonic Solution of a Weakly Non-linear Second Order Differential Equation Governed the Motion of a TM-AFM Cantilever Numerical solutions for nonlinear volterra-fredholm integral equations of the second kind with a phase lag Correction: Numerical solutions for nonlinear Volterra-Fredholm integral equations of the second kind with a phase lag Superharmonic Solutions of Order (2,3) to a MEMS Governed the Motion of a TM-AFM Cantilever