Po-Wen Hsieh, Suh-Yuh Yang & Cheng-Shu You. (1970). A High-Accuracy Finite Difference Scheme for Solving Reaction-Convection-Diffusion Problems with a Small Diffusivity.
Advances in Applied Mathematics and Mechanics. 6 (5).
637-662.
doi:10.4208/aamm.2014.5.s4