1. The classification of links up to link-homotopy;Habegger;J. Amer. Math. Soc.,1990
2. Structured groups and link-homotopy;Hughes;J. Knot Theory Ramifications,1993
3. Finite type link homotopy invariants of k-trivial links;Hughes;J. Knot Theory Ramifications,2003
4. An approach to homotopy classification of links;Levine;Trans. Amer. Math. Soc.,1988
5. Finite type link-homotopy invariants;Lin;Enseign. Math.,2001