“Convergence of an Immersed Interface Upwind Scheme for Linear Advection Equations With Piecewise Constant Coefficients I: $L^1$-Error Estimates”. Journal of Computational Mathematics 26, no. 1 (August 15, 2018): 1–22. Accessed December 5, 2025. https://global-sci.com/index.php/JCM/article/view/11864.