@article{1029001473, author = {Liang, Chao Chu}, title = {Semifree involutions on sphere knots.}, journal = {Michigan Math. J.}, volume = {21}, number = {3}, year = {1975}, pages = { 161-163}, language = {en}, url = {http://dml.mathdoc.fr/item/1029001473} }
Liang, Chao Chu. Semifree involutions on sphere knots.. Michigan Math. J., Tome 21 (1975) no. 3, pp. 161-163. http://gdmltest.u-ga.fr/item/1029001473/