%0 Journal Article
%A Evan Morgan
%A Bogdan Oporowski
%T Bounding tree-width via contraction on the projective plane and torus
%J The electronic journal of combinatorics
%D 2015
%V 22
%N 4
%U http://geodesic.mathdoc.fr/articles/10.37236/2534/
%R 10.37236/2534
%F 10_37236_2534