1. Bing, R. H., Martin, J. M.: Cubes with knotted holes. Trans. Amer. Math. Soc.155, 217?231 (1971)
2. Burde, G., Zieschang, H.: Eine Kennzeichnung der Torusknoten. Math. Ann.167, 169?175 (1966)
3. Feustel, C. D.: Embeddings and essential embeddings of annuli and möbius bands inM 3. preprint
4. Fox, R. H.: A quick trip through knot theory, Topology of 3-Manifolds (M. K. Fort, Ed.). New York: Prentice-Hall 1962
5. Gonzalez-Acuña, F.: Dehn's construction on knots. Bol. Soc. Mat. Mex.15, 58?79 (1970)