@article{NUMA_1989__56_2-3_133421,
     author = {Dragoslav Herceg},
     title = {Uniform {Fourth} {Order} {Difference} {Scheme} for a {Singular} {Perturbation} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {675--694},
     publisher = {mathdoc},
     volume = {56},
     number = {2-3},
     year = {1989},
     zbl = {0668.65060},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1989__56_2-3_133421/}
}