@article{NUMA_1970__15_131989,
     author = {A. van der SLUIS},
     title = {Upperbounds for {Roots} of {Polynomials.}},
     journal = {Numerische Mathematik},
     pages = {250--262},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     zbl = {0204.48205},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__15_131989/}
}