@article{NUMA_1976__27_132437,
     author = {E. Hansen and M. Patrick},
     title = {Estimating the {Multiplicity} of a {Root.}},
     journal = {Numerische Mathematik},
     pages = {121--132},
     publisher = {mathdoc},
     volume = {27},
     year = {1976},
     zbl = {0319.65035},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1976__27_132437/}
}