@article{NUMA_1963__5_131582,
     author = {A.A. GOLDSTEIN},
     title = {On the {Stability} of {Rational} {Approximation.}},
     journal = {Numerische Mathematik},
     pages = {431--438},
     publisher = {mathdoc},
     volume = {5},
     year = {1963},
     zbl = {0115.11801},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1963__5_131582/}
}