@article{GDZPPN002297795, title = {On kth Roots in Power Series Rings.}, journal = {Mathematische Annalen}, volume = {174}, year = {1967}, pages = {327-333}, zbl = {0144.03502}, url = {http://dml.mathdoc.fr/item/GDZPPN002297795} }
BROWN, W.G. On kth Roots in Power Series Rings.. Mathematische Annalen, Tome 174 (1967) pp. 327-333. http://gdmltest.u-ga.fr/item/GDZPPN002297795/