@article{02057402,
title = {Knot Floer homology and the four-ball genus.},
journal = {Geometry \& Topology},
volume = {7},
year = {2003},
pages = {615-639},
doi = {10.2140/gt.2003.7.615},
zbl = {1037.57027},
language = {en},
url = {http://dml.mathdoc.fr/item/02057402}
}
Ozsváth, Peter; Szabó, Zoltán. Knot Floer homology and the four-ball genus.. Geometry & Topology, Tome 7 (2003) pp. 615-639. doi : 10.2140/gt.2003.7.615. http://gdmltest.u-ga.fr/item/02057402/