Dobner, Hans-Jürgen. “Computing Reliable Error Estimations for Integral Equations With Discontinuities”. Rev. Anal. Numér. Théor. Approx. 27, no. 2 (August 1, 1998): 227–236. Accessed November 24, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1998-vol27-no2-art4.