@article{MZ_1988__197_1_183742,
     author = {N. Levenberg and R.E. Molzon},
     title = {Convergence {Sets} of a {Formal} {Power} {Series.}},
     journal = {Mathematische Zeitschrift},
     pages = {411--420},
     publisher = {mathdoc},
     volume = {197},
     number = {1},
     year = {1988},
     zbl = {0617.32001},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__197_1_183742/}
}