%0 Journal Article %A Sankaran, N. %T Rings of Formal Power Series %J Canadian mathematical bulletin %D 1971 %P 207-220 %V 14 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-036-x/ %R 10.4153/CMB-1971-036-x %F 10_4153_CMB_1971_036_x