%0 Journal Article %T Abstracts of Theses %J Canadian mathematical bulletin %D 1968 %P 170-172 %V 11 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S000843950002899X/ %R 10.1017/S000843950002899X %F 10_1017_S000843950002899X