@article{GT_2005_9_3_a6,
     author = {Bar-Natan, Dror},
     title = {Khovanov{\textquoteright}s homology for tangles and cobordisms},
     journal = {Geometry & topology},
     pages = {1443--1499},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {2005},
     doi = {10.2140/gt.2005.9.1443},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2005.9.1443/}
}