Cirulis, T., and O. Lietuvietis. “Degenerate Matrix Method With Chebyshev Nodes for Solving Nonlinear Systems of Differential Equations”. Mathematical Modelling and Analysis 4, no. 1 (December 15, 1999): 51-57. Accessed September 20, 2024. https://btp.vgtu.lt/index.php/MMA/article/view/9969.