@article{NUMA_1986__49_133116,
     author = {J.M., Spijker, M.N. Sanz-Serna},
     title = {Regions of {Stability,} {Equivalence} {Theorems} and the {Courant-Friedrichs-Lewy} {Condition.}},
     journal = {Numerische Mathematik},
     pages = {319--330},
     publisher = {mathdoc},
     volume = {49},
     year = {1986},
     zbl = {0574.65106},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__49_133116/}
}