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@article{MAN_1981__257_163548, author = {C.McA. Gordon}, title = {Ribbon {Concordance} of {Knots} in the {3-Sphere.}}, journal = {Mathematische Annalen}, pages = {157--170}, publisher = {mathdoc}, volume = {257}, year = {1981}, zbl = {0451.57001}, url = {http://geodesic.mathdoc.fr/item/MAN_1981__257_163548/} }
C.McA. Gordon. Ribbon Concordance of Knots in the 3-Sphere.. Mathematische Annalen, Tome 257 (1981), pp. 157-170. http://geodesic.mathdoc.fr/item/MAN_1981__257_163548/