%0 Journal Article
%A T. McKee
%T Validity up to complementation in graph theory
%J Fundamenta Mathematicae
%D 1983
%P 93-98
%V 116
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-116-2-93-98/
%R 10.4064/fm-116-2-93-98
%G en
%F 10_4064_fm_116_2_93_98