@article{1077491416, author = {Hyers, D. H.}, title = {Pseudo-normed linear spaces and Abelian groups}, journal = {Duke Math. J.}, volume = {5}, number = {1}, year = {1939}, pages = { 628-634}, language = {en}, url = {http://dml.mathdoc.fr/item/1077491416} }
Hyers, D. H. Pseudo-normed linear spaces and Abelian groups. Duke Math. J., Tome 5 (1939) no. 1, pp. 628-634. http://gdmltest.u-ga.fr/item/1077491416/