@article{10_2140_agt_2006_6_2051,
     author = {Gordon, Cameron McA and Luecke, John},
     title = {Knots with unknotting number 1 and essential {Conway} spheres},
     journal = {Algebraic and Geometric Topology},
     pages = {2051--2116},
     year = {2006},
     volume = {6},
     number = {5},
     doi = {10.2140/agt.2006.6.2051},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.2051/}
}