@article{1077377957, author = {Lacher, R. C.}, title = {A disk in $n$ -space which lies on no $2$ -sphere}, journal = {Duke Math. J.}, volume = {35}, number = {1}, year = {1968}, pages = { 735-738}, language = {en}, url = {http://dml.mathdoc.fr/item/1077377957} }
Lacher, R. C. A disk in $n$ -space which lies on no $2$ -sphere. Duke Math. J., Tome 35 (1968) no. 1, pp. 735-738. http://gdmltest.u-ga.fr/item/1077377957/