%0 Journal Article
%A Daniel Gonçalves
%T Not all planar graphs are in PURE-4-DIR
%J Journal of Graph Algorithms and Applications
%D 2020
%P 293-301
%V 24
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00533/
%R 10.7155/jgaa.00533
%G en
%F JGAA_2020_24_3_a7