TY  - JOUR
AU  - Powell, Mark
TI  - A second order algebraic knot concordance group
JO  - Algebraic and Geometric Topology
PY  - 2012
SP  - 685
EP  - 751
VL  - 12
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.2140/agt.2012.12.685/
DO  - 10.2140/agt.2012.12.685
ID  - 10_2140_agt_2012_12_685
ER  -