%0 Journal Article %A Jackson, H. L. %T On The Mapping Properties of Certain Exceptional Sets in R2 %J Canadian journal of mathematics %D 1975 %P 44-49 %V 27 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-007-1/ %R 10.4153/CJM-1975-007-1 %F 10_4153_CJM_1975_007_1