@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/