@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/