@article{GT_2007_11_1_a6,
     author = {Lisca, Paolo},
     title = {Lens spaces, rational balls and the ribbon conjecture},
     journal = {Geometry & topology},
     pages = {429--472},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2007},
     doi = {10.2140/gt.2007.11.429},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2007.11.429/}
}