Po-Wen Hsieh, Yin-Tzer Shih, Suh-Yuh Yang and Cheng-Shu You. (2018). A Novel Technique for Constructing Difference Schemes for Systems of Singularly Perturbed Equations.
Communications in Computational Physics. 19 (5).
1287-1301.
doi:10.4208/cicp.scpde14.21s