@article{NUMA_1985__46_133012,
     author = {Koichi Niijima},
     title = {On a {Difference} {Scheme} of {Exponential} {Type} for a {Nonlinear} {Singular} {Perturbation} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {521--540},
     publisher = {mathdoc},
     volume = {46},
     year = {1985},
     zbl = {0577.65070},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1985__46_133012/}
}