1. Cobordism of classical knots;Casson,1986
2. On slice knots in dimension three;Casson;Proc. Symp. in Pure Math.,1978
3. Link concordance invariants and homotopy theory;Cochran;Invent. Math.,1987
4. Not all links are concordant to boundary links;Cochran;Bull. A.M.S.,1990
5. Notes on the Witt Classification of Hermitian Innerproduct Spaces over a Ring of Algebraic Integers;Conner,1979