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@article{MZ_1974__138_172102, author = {Kennth I. Appel}, title = {On the {Conjugacy} {Problem} for {Knot} {Groups.}}, journal = {Mathematische Zeitschrift}, pages = {273--294}, publisher = {mathdoc}, volume = {138}, year = {1974}, zbl = {0276.20033}, url = {http://geodesic.mathdoc.fr/item/MZ_1974__138_172102/} }
Kennth I. Appel. On the Conjugacy Problem for Knot Groups.. Mathematische Zeitschrift, Tome 138 (1974), pp. 273-294. http://geodesic.mathdoc.fr/item/MZ_1974__138_172102/