@article{NUMA_1973__21_132208,
     author = {Torsten Str\"om},
     title = {Monotonicity and {Error} {Bounds} in {Schemes} of {Romberg} {Type} for the {Computation} of f(n) (0) by {Central} {Differences} and {Extrapolation.}},
     journal = {Numerische Mathematik},
     pages = {14--21},
     publisher = {mathdoc},
     volume = {21},
     year = {1973},
     zbl = {0337.65016},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132208/}
}