TY  - JOUR
AU  - Evan Morgan
AU  - Bogdan Oporowski
TI  - Bounding tree-width via contraction on the projective plane and torus
JO  - The electronic journal of combinatorics
PY  - 2015
VL  - 22
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.37236/2534/
DO  - 10.37236/2534
ID  - 10_37236_2534
ER  -