@article{10_2140_agt_2006_6_1095,
     author = {Klaff, Ben and Shalen, Peter B},
     title = {The diameter of the set of boundary slopes of a knot},
     journal = {Algebraic and Geometric Topology},
     pages = {1095--1112},
     year = {2006},
     volume = {6},
     number = {3},
     doi = {10.2140/agt.2006.6.1095},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.1095/}
}