@article{1077376237, author = {Gillman, David S.}, title = {Unknotting $2$ -manifolds in $3$ -hyperplanes of $E\sp{4}$}, journal = {Duke Math. J.}, volume = {33}, number = {1}, year = {1966}, pages = { 229-245}, language = {en}, url = {http://dml.mathdoc.fr/item/1077376237} }
Gillman, David S. Unknotting $2$ -manifolds in $3$ -hyperplanes of $E\sp{4}$. Duke Math. J., Tome 33 (1966) no. 1, pp. 229-245. http://gdmltest.u-ga.fr/item/1077376237/