We will apply the fixed point method for proving the generalized Hyers-Ulam stability of the integral equation which is strongly related to the wave equation.
"A Fixed Point Approach to the Stability of an Integral Equation Related to the Wave Equation." Abstr. Appl. Anal. 2013 (SI49) 1 - 4, 2013. https://doi.org/10.1155/2013/612576