@article{1103034374, author = {Laatsch, Richard G.}, title = {Extensions of subadditive functions.}, journal = {Pacific J. Math.}, volume = {14}, number = {4}, year = {1964}, pages = { 209-215}, language = {en}, url = {http://dml.mathdoc.fr/item/1103034374} }
Laatsch, Richard G. Extensions of subadditive functions.. Pacific J. Math., Tome 14 (1964) no. 4, pp. 209-215. http://gdmltest.u-ga.fr/item/1103034374/