@article{10_37236_1656,
     author = {B. Courcelle and V. Dussaux},
     title = {Map genus, forbidden maps, and monadic second-order logic},
     journal = {The electronic journal of combinatorics},
     year = {2002},
     volume = {9},
     doi = {10.37236/1656},
     zbl = {1016.05026},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1656/}
}