%0 Journal Article
%A A.H. Blue
%T On the Structure of Sets of Points of Classes One, Two and Three
%J Mathematische Annalen
%D 1930
%P 624-632
%V 102
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1930__102_159398/
%F MAN_1930__102_159398