@article{1077377302, author = {Schaufele, C. B.}, title = {The commutator group of a doubled knot}, journal = {Duke Math. J.}, volume = {34}, number = {1}, year = {1967}, pages = { 677-681}, language = {en}, url = {http://dml.mathdoc.fr/item/1077377302} }
Schaufele, C. B. The commutator group of a doubled knot. Duke Math. J., Tome 34 (1967) no. 1, pp. 677-681. http://gdmltest.u-ga.fr/item/1077377302/