Scheiber, Ernest. “On the Numerical Picard Iterations With Collocations for the Initial Value Problem”. J. Numer. Anal. Approx. Theory 48, no. 1 (September 8, 2019): 89–105. Accessed February 7, 2026. https://www.ictp.acad.ro/jnaat/journal/article/view/1146.