@article{bwmeta1.element.bwnjournal-article-fmv34i1p18,
author = {H. Kestelman},
title = {On the functional equation f(x+y) =f(x) +f(y)},
journal = {Fundamenta Mathematicae},
volume = {34},
year = {1947},
pages = {144-147},
zbl = {0032.02804},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv34i1p18}
}
Kestelman, H. On the functional equation f(x+y) =f(x) +f(y). Fundamenta Mathematicae, Tome 34 (1947) pp. 144-147. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv34i1p18/