@article{NUMA_1974__22_132278,
     author = {L.R. Abrahamsson and H.B. Keller and H.O. Kreiss},
     title = {Difference {Approximations} for {Singular} {Perturbations} of {Systems} of {Ordinary} {Differential} {Equations.}},
     journal = {Numerische Mathematik},
     pages = {367--392},
     publisher = {mathdoc},
     volume = {22},
     year = {1974},
     zbl = {0314.65042},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1974__22_132278/}
}