@article{IM_1979__54_142673,
     author = {R.A. Litherland},
     title = {Slicing {Doubles} of {Knots} in {Homology} {3-Spheres.}},
     journal = {Inventiones mathematicae},
     pages = {69--74},
     publisher = {mathdoc},
     volume = {54},
     year = {1979},
     zbl = {0418.57001},
     url = {http://geodesic.mathdoc.fr/item/IM_1979__54_142673/}
}