@article{IM_1995__119_3_144251,
     author = {Lee Rudolph},
     title = {An obstruction to sliceness via contact geometry and },
     journal = {Inventiones mathematicae},
     pages = {155--164},
     publisher = {mathdoc},
     volume = {119},
     number = {3},
     year = {1995},
     zbl = {0843.57011},
     url = {http://geodesic.mathdoc.fr/item/IM_1995__119_3_144251/}
}