1. [C] Casson, A.J.: Three lectures on new infinite constructions in 4-dimensional manifolds. (Notes by L. Guillou), Orsay Lecture Notes, 57R65-57R80 (1980)
2. [CF] Casson, A., Freedman, M.: Atomic surgery problems, Proc. AMS Low Dimensional Topology, Durham, New Hampshire, ed. C. Gordon (1982)
3. [Ch] Chen, K.-T.: Isotopy invariants of links. Ann. Math.56, 343?353 (1952)
4. [E] Edwards, R.: The solution of the 4-dimensional annulus conjecture (after Frank Quinn), To appear in proceedings of conference, Durham, New Hampshire, (1982)
5. [F1] Freedman, M.H.: A fakeS 3 ×R. Ann. Math.110, 177?201 (1979)