@article{1029000313, author = {Husch, L. S. and Rushing, T. B.}, title = {Restrictions of isotopies and concordances.}, journal = {Michigan Math. J.}, volume = {16}, number = {1}, year = {1969}, pages = { 303-307}, language = {en}, url = {http://dml.mathdoc.fr/item/1029000313} }
Husch, L. S.; Rushing, T. B. Restrictions of isotopies and concordances.. Michigan Math. J., Tome 16 (1969) no. 1, pp. 303-307. http://gdmltest.u-ga.fr/item/1029000313/