TY  - JOUR
AU  - B. Courcelle
AU  - V. Dussaux
TI  - Map genus, forbidden maps, and monadic second-order logic
JO  - The electronic journal of combinatorics
PY  - 2002
VL  - 9
UR  - http://geodesic.mathdoc.fr/articles/10.37236/1656/
DO  - 10.37236/1656
ID  - 10_37236_1656
ER  -