@article{10_2140_agt_2010_10_739,
     author = {Cochran, Tim D and Harvey, Shelly and Leidy, Constance},
     title = {Derivatives of knots and second-order signatures},
     journal = {Algebraic and Geometric Topology},
     pages = {739--787},
     year = {2010},
     volume = {10},
     number = {2},
     doi = {10.2140/agt.2010.10.739},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2010.10.739/}
}