%0 Journal Article %A Gittings, Raymond F. %T Some Results on Weak Covering Conditions %J Canadian journal of mathematics %D 1974 %P 1152-1156 %V 26 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-107-5/ %R 10.4153/CJM-1974-107-5 %F 10_4153_CJM_1974_107_5