@article{1077465182, author = {Bradford, W. H.}, title = {Sub-biharmonic functions}, journal = {Duke Math. J.}, volume = {20}, number = {1}, year = {1953}, pages = { 173-176}, language = {en}, url = {http://dml.mathdoc.fr/item/1077465182} }
Bradford, W. H. Sub-biharmonic functions. Duke Math. J., Tome 20 (1953) no. 1, pp. 173-176. http://gdmltest.u-ga.fr/item/1077465182/