@article{02139857,
title = {An invariant of link cobordisms from Khovanov homology.},
journal = {Geometry \& Topology},
volume = {8},
year = {2004},
pages = {1211-1251},
doi = {10.2140/agt.2004.4.1211},
zbl = {1072.57018},
language = {en},
url = {http://dml.mathdoc.fr/item/02139857}
}
Jacobsson, Magnus. An invariant of link cobordisms from Khovanov homology.. Geometry & Topology, Tome 8 (2004) pp. 1211-1251. doi : 10.2140/agt.2004.4.1211. http://gdmltest.u-ga.fr/item/02139857/