@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/}
}