@article{AM2_1980__21_182427,
     author = {J.F. Traub and H. Wozniakowski},
     title = {Optimal radius of convergence of interpolatory iterations for operator equations.},
     journal = {Aequationes mathematicae},
     pages = {159--172},
     publisher = {mathdoc},
     volume = {21},
     year = {1980},
     zbl = {0447.65027},
     url = {http://geodesic.mathdoc.fr/item/AM2_1980__21_182427/}
}