@article{IM_1985__80_143239,
     author = {Michael H. Freedman},
     title = {A new technique for the link slice problem.},
     journal = {Inventiones mathematicae},
     pages = {453--466},
     publisher = {mathdoc},
     volume = {80},
     year = {1985},
     zbl = {0569.57002},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__80_143239/}
}