@article{NUMA_1977__28_132478,
     author = {W. Hackbusch},
     title = {Extrapolation {Applied} to {Certain} {Discretization} {Methods} {Solving} the {Initial} {Value} {Problem} for {Hyperbolic} {Differential} {Equations.}},
     journal = {Numerische Mathematik},
     pages = {121--142},
     publisher = {mathdoc},
     volume = {28},
     year = {1977},
     zbl = {0342.65057},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1977__28_132478/}
}