@article{NUMA_1987__55_4_133365,
     author = {Guido Walz},
     title = {A {Contour} {Integral} {Representation} of {Linear} {Extrapolation} {Methods.}},
     journal = {Numerische Mathematik},
     pages = {477--480},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {1987},
     zbl = {0655.65003},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__55_4_133365/}
}