@article{GT_2014_18_3_a7, author = {Cha, Jae Choon and Powell, Mark}, title = {Covering link calculus and the bipolar filtration of topologically slice links}, journal = {Geometry & topology}, pages = {1539--1579}, publisher = {mathdoc}, volume = {18}, number = {3}, year = {2014}, doi = {10.2140/gt.2014.18.1539}, url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2014.18.1539/} }