%0 Journal Article
%A Powell, Mark
%T A second order algebraic knot concordance group
%J Algebraic and Geometric Topology
%D 2012
%P 685-751
%V 12
%N 2
%U http://geodesic.mathdoc.fr/articles/10.2140/agt.2012.12.685/
%R 10.2140/agt.2012.12.685
%F 10_2140_agt_2012_12_685