@article{10_2140_agt_2005_5_1365,
     author = {Helme-Guizon, Laure and Rong, Yongwu},
     title = {A categorification for the chromatic polynomial},
     journal = {Algebraic and Geometric Topology},
     pages = {1365--1388},
     year = {2005},
     volume = {5},
     number = {4},
     doi = {10.2140/agt.2005.5.1365},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2005.5.1365/}
}