%0 Journal Article
%A Ulrik Brandes
%A Barbara Pampel
%T Orthogonal-Ordering Constraints are Tough
%J Journal of Graph Algorithms and Applications
%D 2013
%P 1-10
%V 17
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00281/
%R 10.7155/jgaa.00281
%G en
%F JGAA_2013_17_1_a0