%0 Journal Article %A Handelman, David %T Completions of Rank Rings %J Canadian mathematical bulletin %D 1977 %P 199-205 %V 20 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-032-3/ %R 10.4153/CMB-1977-032-3 %F 10_4153_CMB_1977_032_3