@article{10_2140_agt_2016_16_3653,
     author = {Roberts, Lawrence},
     title = {A type {A} structure in {Khovanov} homology},
     journal = {Algebraic and Geometric Topology},
     pages = {3653--3719},
     year = {2016},
     volume = {16},
     number = {6},
     doi = {10.2140/agt.2016.16.3653},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2016.16.3653/}
}