%0 Journal Article %A R. Parvatham %A S. Radha %T On certain classes of analytic functions %J Annales Polonici Mathematici %D 1988 %P 31-34 %V 49 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-49-1-31-34/ %R 10.4064/ap-49-1-31-34 %G en %F 10_4064_ap_49_1_31_34