Uniformconvergenceanalysisofanupwindfinitedifferenceapproximationsofanhomogenoussingularlyperturbedboundaryvalueproblemusinggridequidistribution,孙力楠,王安涛,Wederivevarepsilon-uniformerrorestimatesfortwofirst-orderupwinddiscretizationsofamodelinhomogeneous,second-order,