@article {IOPORT.50303262,
    author       = {Pakdemirli, M. and Elmas, N.},
    title        = {Perturbation theorems for estimating magnitudes of roots of polynomials},
    year         = {2010},
    journal      = {Applied Mathematics and Computation},
    volume       = {216},
    number       = {5},
    pages        = {1645-1651},
    doi          = {10.1016/j.amc.2010.03.020},
    identifier   = {50303262},
}