@article{GDZPPN002035308, title = {Roots of formal power series in one variable.}, journal = {Aequationes mathematicae}, volume = {28}, year = {1985}, pages = {40-43}, zbl = {0578.39006}, url = {http://dml.mathdoc.fr/item/GDZPPN002035308} }
Schwaiger, J. Roots of formal power series in one variable.. Aequationes mathematicae, Tome 28 (1985) pp. 40-43. http://gdmltest.u-ga.fr/item/GDZPPN002035308/