Cirulis, T., and O. Lietuvietis. “Analysis of Generalized Multistep Adam’s Methods by Degenerate Matrix Method for Ordinary Differential Equations”. Mathematical Modelling and Analysis 6, no. 2 (December 15, 2001): 192-198. Accessed September 29, 2021. https://journals.vgtu.lt/index.php/MMA/article/view/9898.