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@article{CMH_1981__56_139863, author = {D.W. Sumners and L.R. Hitt}, title = {Many different disk knots with the same exterior.}, journal = {Commentarii mathematici Helvetici}, pages = {142--147}, publisher = {mathdoc}, volume = {56}, year = {1981}, zbl = {0465.57006}, url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139863/} }
D.W. Sumners; L.R. Hitt. Many different disk knots with the same exterior.. Commentarii mathematici Helvetici, Tome 56 (1981), pp. 142-147. http://geodesic.mathdoc.fr/item/CMH_1981__56_139863/