@article{1102971088, author = {Wong, Chi Song}, title = {Subadditive functions.}, journal = {Pacific J. Math.}, volume = {39}, number = {3}, year = {1971}, pages = { 549-551}, language = {en}, url = {http://dml.mathdoc.fr/item/1102971088} }
Wong, Chi Song. Subadditive functions.. Pacific J. Math., Tome 39 (1971) no. 3, pp. 549-551. http://gdmltest.u-ga.fr/item/1102971088/