%0 Journal Article %A Silva, M.R. da %T Nonnegative order iterates of Bernstein polynomials and their limiting semigroup %J Portugaliae mathematica %D 1983 %P 225-248 %V 42 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1983__42_3_115539/ %G en %F PORMA_1983__42_3_115539