@article{1077490486, author = {Whitney, Hassler}, title = {Cross-sections of curves in $3$ -space}, journal = {Duke Math. J.}, volume = {4}, number = {1}, year = {1938}, pages = { 222-226}, language = {en}, url = {http://dml.mathdoc.fr/item/1077490486} }
Whitney, Hassler. Cross-sections of curves in $3$ -space. Duke Math. J., Tome 4 (1938) no. 1, pp. 222-226. http://gdmltest.u-ga.fr/item/1077490486/