%0 Journal Article %A Douglas, Robert J. %T A Note on a Theorem of H. L. Abbott %J Canadian mathematical bulletin %D 1970 %P 79-81 %V 13 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-016-1/ %R 10.4153/CMB-1970-016-1 %F 10_4153_CMB_1970_016_1