@article{1077493229, author = {Stone, A. H. and Tukey, J. W.}, title = {Generalized ``sandwich'' theorems}, journal = {Duke Math. J.}, volume = {9}, number = {1}, year = {1942}, pages = { 356-359}, language = {en}, url = {http://dml.mathdoc.fr/item/1077493229} }
Stone, A. H.; Tukey, J. W. Generalized “sandwich” theorems. Duke Math. J., Tome 9 (1942) no. 1, pp. 356-359. http://gdmltest.u-ga.fr/item/1077493229/