%0 Journal Article %A Davis, Christopher W. %T Concordance, Crossing Changes, and Knots in Homology Spheres %J Canadian mathematical bulletin %D 2020 %P 744-754 %V 63 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000791/ %R 10.4153/S0008439519000791 %F 10_4153_S0008439519000791