@article{1270130386, author = {SAKATA, Hiroshi}, title = {Convexity Theorems for Riesz Means}, journal = {Tokyo J. of Math.}, volume = {14}, number = {2}, year = {1991}, pages = { 459-477}, language = {en}, url = {http://dml.mathdoc.fr/item/1270130386} }
SAKATA, Hiroshi. Convexity Theorems for Riesz Means. Tokyo J. of Math., Tome 14 (1991) no. 2, pp. 459-477. http://gdmltest.u-ga.fr/item/1270130386/