Jyrki Piila, Juhani Pitkäranta "On the Integral Equation $f(x)-(c/L(x))\int^{L(x)}_0f(y)\,dy=g(x)$ where $L(x)=\min\{ax,1\}, a\gt 1$," Journal of Integral Equations and Applications, J. Integral Equations Applications 8(3), 363-378, (SUMMER 1996)