%0 Journal Article %A G.H. Hardy %A J.E. Littlewood %T Elementary theorems concerning power series with positive coefficients and moment constants of positive functions. %J Journal für die reine und angewandte Mathematik %D 1927 %P 141-158 %V 157 %I mathdoc %U http://geodesic.mathdoc.fr/item/JRAM_1927__157_149619/ %F JRAM_1927__157_149619