@article{NUMA_1963__5_131579,
     author = {W. B\"ORSCH-SUPAN},
     title = {A posteriori error bounds for the zeros of polynomials.},
     journal = {Numerische Mathematik},
     pages = {380--398},
     publisher = {mathdoc},
     volume = {5},
     year = {1963},
     zbl = {0133.08401},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1963__5_131579/}
}