@article{1028998970, author = {Cantrell, J. C.}, title = {Non-flat embeddings of $S^{n-1}$ in $S^n$.}, journal = {Michigan Math. J.}, volume = {10}, number = {1}, year = {1963}, pages = { 359-362}, language = {en}, url = {http://dml.mathdoc.fr/item/1028998970} }
Cantrell, J. C. Non-flat embeddings of $S^{n-1}$ in $S^n$.. Michigan Math. J., Tome 10 (1963) no. 1, pp. 359-362. http://gdmltest.u-ga.fr/item/1028998970/