@article{1077476112,
author = {Rosenbaum, R. A.},
title = {Sub-additive functions},
journal = {Duke Math. J.},
volume = {17},
number = {1},
year = {1950},
pages = { 227-247},
language = {en},
url = {http://dml.mathdoc.fr/item/1077476112}
}
Rosenbaum, R. A. Sub-additive functions. Duke Math. J., Tome 17 (1950) no. 1, pp. 227-247. http://gdmltest.u-ga.fr/item/1077476112/