@article{10_2140_agt_2007_7_1531,
     author = {Champanerkar, Abhijit and Kofman, Ilya and Stoltzfus, Neal},
     title = {Graphs on surfaces and {Khovanov} homology},
     journal = {Algebraic and Geometric Topology},
     pages = {1531--1540},
     year = {2007},
     volume = {7},
     number = {3},
     doi = {10.2140/agt.2007.7.1531},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2007.7.1531/}
}