@article{10_2140_agt_2007_7_1201,
     author = {Plamenevskaya, Olga},
     title = {A combinatorial description of the {Heegaard} {Floer} contact invariant},
     journal = {Algebraic and Geometric Topology},
     pages = {1201--1209},
     year = {2007},
     volume = {7},
     number = {3},
     doi = {10.2140/agt.2007.7.1201},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2007.7.1201/}
}