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@article{IM_1985__82_143276, author = {M.G. Scharlemann}, title = {Unknotting number one knots are prime.}, journal = {Inventiones mathematicae}, pages = {37--56}, publisher = {mathdoc}, volume = {82}, year = {1985}, zbl = {0576.57004}, url = {http://geodesic.mathdoc.fr/item/IM_1985__82_143276/} }
M.G. Scharlemann. Unknotting number one knots are prime.. Inventiones mathematicae, Tome 82 (1985), pp. 37-56. http://geodesic.mathdoc.fr/item/IM_1985__82_143276/